I've tested this wet suit in a sea water of 19 degrees Celsius for 50 minute and for 75 minute swimming crawl, back-stroke and breast-stroke and it's very warm ( real test will be when temperature drops to about 13 degrees)... suit is relatively comfortable, although it's not easiest to put on or to get out from (I recommend model with zipper on lover legs, but if you're not in a hurry it's perfectly fine if you know what you doing with a smooth skin neoprene wet suit (I have experience with wetsuits of 20+ years as a freediver and my choice of material would be Heiwa smooth skin out/ open cell in neoprene, but this smooth skin neoprene with poliester inside is comfortable enough, even for a long swim sessions... I would also recommend ordering a size according to your height, I have ordered a L instead of XL or XXL because I'm relatively skinny, but very fit...
Overall, I am very pleased with material and craftsmanship (all stitching crossings and endings are patched) so I'm convinced it will last (and if any of stichings go a split or get punctured, it's easy to fix it with a glue (it's a normal long-term maintenance of a wetsuit... Once again, I'm pleased with this wetsuit and thank you!