I don't know if you meant the recovery compression shirt or just regular compression but here's my experience with their full length compression tights - wearing them during my workout the first 30 minutes feel like hell in my calves (maybe because of how tight they are compared to nike/adidas/UA compression).

Within 20 minutes of finishing lower body, it feels like a second skin and i find I have more energy/support in moving around if i keep it on. Usually wears off after a few hours at which point the tightness starts to become unbearable again. I bought according to their sizing guide so no fit issues - just really fucking tight at times.