I am also considering the Maxis pullers. That said, in my asking around, the following comments were made to me:

-"Greenlee had it....they wouldn't have dropped it without good reason (From Greenlee distributor)";

-"had it and burned out my hole-hawg (from two formers users)"; and,

-"Half the guys who buy them love them, the other half return them after one use (from Maxis distributor)".

My take is that it all depends on what you're pulling. If you're typically pulling branch circuits -up to #2, perhaps- the Maxis should do well. If you're installing 400KW gensets, and pulling 500MCM, you're probably going to be disappointed. The limiting factor seems to be the Hole-Hawg.