I was with in the first batch of towerhobbies and mine is still running great. Have about 3 runs with 4s 5000mah maxamps with an 8xl and about 5 runs with 5s 5000mah flight power with a Neu 1515 1y. No fan failure nor bec failure. I am running it with the MMM bec that is built in too. This is all in a BL FLM Savage 16/47 locked in 2nd from a 3 speed.

:UPDATE:
4s for over 3 hours 8XL, 7XL, ext. BEC, AND 4000 MAH LIPO
and 6s for 1 hour and a half with 9XL feigao, 65t spur , 18t pinion, ext. BEC, AND 4000 MAH LIPO
ps. not sure how long it will alive

Still working on 5S for around 3 hours with Ext. BEC, standard fan, NEU 1512 2.5D

Mine still works. All stock running with 6S Neuenergy 5000mah, Tekno RC neu 1515 1Y.

ive got about 6 hour on first mine using the esc bec:yes: i try a 7xl.6xl.9l.and now i run a 1515 1y no issue at all... my other mmm run good whit a external bec....on 3 cell with a 9l(feigao) this week im gonna try without the ubec im scared:mdr::lol:

I've got 2 MMM's running on 6S, each using esc bec, both working for over 3 hours each.