I have a 1 piece suit and it really smells of great leather ... got it second hand but purchased from Customs Props as mentioned by the previous owner ... I still need to go to the gym to build my body for a perfect fit
I have a Custom Props 3-piece leather body suit (and his gloves, which are also great). I've trooped in some pretty hot weather here and have never felt uncomfortable in the suit. Make sure you get some quality gear to wear under the suit as well. I use Under Armour Heat Gear (pants, top, balaclava).