At the same time I ordered heatsink and this housing. Help the heatsink without the housing to keep Pi on 52Grad (CPU temperature) but unfortunately it can not be 100% close because the lid slightly arch the housing with the mounted heatsinks.
This also results in a heat accumulation which is counterproductive ... unfortunately ...
Without heatsink makes the housing her a lot, who abe heatsink in use should rather stay away from this case ...
Raspberry Pi B +