Too expensive for me.
You're right to be skeptical about the high notes, as that's where every Rick sample library I've heard falls down.
The sole audio demo they provide isn't a good example. There, it sounds an awful lot like the SampleTank/Infinite Player Rickenbacker 12. What use I've gotten out of that one has only been with distortion like the Musiclab demo, because the clean sounds and upper octaves lack sparkle. My mental reference is a real Rick 12 I played for many years before foolishly selling it.
I'd check their resale policy before taking a chance on it.