I had never worn base layers except in cold weather, but after seeing many pros wear mesh base layers in hot weather, I decided to give this a try.
I wish I had tried these a long time ago. Using one under bibshorts is much more comfortable - no more chafing from the straps, cooler in hot weather (as long as you're not wearing a tight black jersey), and warmer in cool weather.
I now own several of these and they've survived many dozens of washes with no adverse effects.
It's still too early to tell if this will fall apart over time. I plan on using it weekly as I did with my Pearl Izumi baselayer and so far it's lasted me 3 years with no issues. So I will compare it to my PI. It's very light, and comfy, keeps me cool in the Florida hot and humid weather. I don't feel sticky at the end of my rides and still able to not feel overheated. I bought a size medium, which I usually wear, but appears to be more loose. Maybe next time I'll order a small and see if it'll fit well. Anyway, like I said earlier my review might change over time since I'm going to compare it to my PI that I've been using for over 3 years and so far nothing wrong with it.
Used under jersey in all weather conditions. Keeps a layer of ventilation when it's hot out allowing cooler air layer between skin and jersey, jersey doesn't stick to the skin.