We had a wonderful time using our new bouncer yesterday, which was a slightly overcast, cooler summer day.  The kids played for hours, and got loads of exercise.  Adults (who weigh less than 200 lbs) also had fun taking turns sitting in the bouncer while the kids jumped around us.  The day before, however, was not such fun, as it was a very hot and sunny day. The blue floor of the bouncer soaks up the suns rays, making the floor hot to the touch.  It also bounces the suns rays back up at you, making the bouncer feel like a tanning bed or sauna.  We will definitely not be able to use it on very sunny days, as there is no shady place in our yard where we have enough space and can still access electricity.  I wish I had bought the shaded version.  (Didn't buy it after reading one review which mentioned it tends to trap bugs)