Once you cross that 40-44lb mark the "bulk-factor" increases ...... a lOT. At 50 lbs the PSR9000 was a bear to manipulate, any higher is just not smart packaging.
I'm going to need a lot of convincing to even audition this one. I have never found a Gem product that pleased me with sounds or ease of use. They don't sell well in my part of the world either. On the US East coast - you never see them in operation....or even in the stores, for that matter.
Sounds like another "Wersi-wannabee" in other words - big, expensive, and nobody wants them.