The only disadvantage I can think of owning a Jem is the pressumption that people have that you're a
Steve Vai wannabe when you play up on stage with a Jem. For some people it's no biggie for others, it's a thing they want to avoid.
And yes, the Jem77BRMR is a bit of a fingerprint magnet. No complaints about the the Jem7WVH aside from what was mentioned aboved.
(I used to think Jems were the best things around but once I got my first J-Custom I never looked back)