I have one and it worked well in my maxx. I am favoring my medusa though and will sell the 600xl. I would venture to say it is better than the feigao motors as I didn't have heat issues with it. The sound is cool too with the built in fan, it kind of has a turbine note to it.
I have run the 600l and the 600xl on 5 and 6s. I prefer the medusa. Heli guys routinely replace them with neu motors. I would buy a medusa over the align, same price. Better performance than the align, which tends to spool up slower than the medusa.
Last I ran at 15 minutes ESC 125-130 and motor 165-170 ambient 98-102 with 6s on the 1500kv motor. Gearing 20/68 but I will drop to 18/68 do to the high outside temps.