I’m primarily a rower, and I wear this suit for my daily 10k rows at low intensity, as well as other forms of low-intensity steady state workouts (LISS). It feels AMAZING to wear this suit for many reasons, and I’m totally converted!!Sizing - I’m tall and thin: 6’1”, 160 lbs, size 10 pants, 39” hips and 31” waist, 36D. According to the chart, I should have gotten a Large based on my weight. But I got a Medium because I prefer tight fits. And indeed, it’s VERY tight on me, so I think their size chart is spot-on correct. The material is 65% neoprene, 25% nylon, 10% spandex.Pros:-It does its primary job of making you sweat more! The sweat literally runs down your legs and arms from the suit! Gross, but effective!-The tight fit actually improves your posture (pulls your shoulders back) and encourages good form in whatever movement you’re doing, which is also good for injury prevention. It’s like wearing a back brace, feels REALLY nice.-Due to the increased heat, the muscles remain warmer and therefore more flexible. During my long 10k rows, my usual tension spots which develop are now completely gone, and I’m honestly shocked at how much more comfortable and enjoyable my workouts are when I wear this suit. I feel like a well-oiled machine!-Working out in this suit produces an “afterburn” effect which causes you to burn more calories after the workout. (Similar to the effect that HIIT has). This is why it can produce greater FAT loss results when used consistently, aside from the simple water weight loss it will cause.-Visually, the suit is very flattering! It also gives you a great opportunity to show off any bras you really like to wear. ;)Cons:-The material in the gluteal region is actually see-through!!! Was not expecting this! I tried every color of underwear, doesn’t matter, you can still see it!-The zipper can easily unzip because the suit is very tight, and astoundingly there is no clasp at all to secure the zipper. I made my own clasp, because I fear it will definitely come unzipped.-It’s a little bit of a hassle to keep it clean to prevent it constantly smelling like sweat, because you can’t machine wash it. You basically have to rinse it and let it drip dry, just like a wetsuit, and hope it doesn’t stink! Haha.Additional comments/recommendations:This is NOT meant for “heavy or prolonged exercise,” and there are tags attached specifically warning you about this. You WILL begin to heat up rapidly after a certain point. Then your heart rate will be be stuck elevated (even at a slower pace than normal) at which point you risk overheating if you continue for a long time. I therefore STRONGLY recommend a HR monitor, so that you can monitor your HR and continue working out safely, and get MAXIMUM results! I think you can definitely work out for a long time in this suit, as long as you’re smart about it. But be aware that by doing this (keeping a safe HR), your pace will be slower. You’re NOT gonna get record-breaking times for any endurance pieces in this suit. In fact they’ll be worse, but don’t feel discouraged -- you’re still getting a great, satisfying workout, with added benefits of extra sweating and long-term greater fat loss results.To summarize … in general, DON’T use this suit when:-Your workouts are focused on high intensity, or you want to achieve your best times.-It’s already hot outside.I wore this to work with a shirt over it, and no one even noticedThe quality of this suit appeared to be excellent. I ordered a medium according to their rather vague size chart and reviews that had me suspecting that I'd be a medium. I'm 5'3" 140 lbs, 29"waist, 40" hips. The suit was much too tight in the arms/shoulders/ribcage but ok in the hips and legs. I managed to get it on, but it would've been too constricting for a power yoga type workout. The arms were the worst - it felt like they were going to cut off my circulation almost immediately. Getting out of the suit was even more difficult!! I wish they hadn't put the tag on the zipper, because I accidentally pulled it off while attempting to pull the zipper up trying it on. Hopefully Amazon doesn't ding me for that, because I returned the suit perfectly new and unworn in its original packaging. I'm considering ordering a large, just because I really liked the design of the suit (especially the way the buttock region is non-neoprene). But honestly I'm getting a little burned out on buying and returning stuff that doesn't work out. I live in a fairly rural area, where my primary access to shopping is online, and it just bums me out to be repeatedly having to send stuff back due to inaccurate website descriptions. I just wish that manufacturers could get better about their size charts. Maybe they should post photos of women wearing the different sizes, along with their actual body measurements, so that we consumers have a better shot of choosing the right size the first time...I initially ordered an XL based off of some reviews, however after shortly receiving the item, all I could do is laugh to myself because I knew all this glory was not going to slide up into this suit to save my life.I reordered the item in a XXXL, let me tell you why. I am 5'2 and toggle between 275-280lbs, as you can tell by the photos I have been blessed with a lot of different shapes and curves. Seeing the XL, I did not want to waste time and money, so I skipped the XXL, I'm so glad I did. When I first hopped into this suit, I thought. "This might not work out as planned." However after a little tugging and adjusting, I was able to get it on. I did have a challenge zipping up standing up, so please save yourself some time, lay on a flat surface. I heated up quickly and needed some water after this installation. I did not put any product on i.e. Sweet Sweat. I like the fact it fully covers my arms, fit snug, and the suit was comfortable, and I was able to bed and stretch. I will however recommend adding a hook at the top above the zipper, because mine came unzipped during my workout. So far it seems pretty durable. Also it is very hard to get out of. Next time I might have to use a hanger to help pull the arms down. Overall I think this will be an asset to my workout.