I've got a Pulse XT 40. It has a Efilte Power 46, Castle creations 80 ESC, and a APC 13X6.5prop. I power it with a 5S1P 3750mah battery.
It flies great. There are couple of youtube videos of it's flight.
I've had a couple of Pulse XT 60's but they were destroyed by being overpowered. I was really scared to get another Pulse but I also thought
that if I didn't over power it it might survive. So far it has and it has been reliable, clean, and truely wonderfull to fly. We even used it as a test
bed for other motor, prop, and battery combinations.

James