So, given I really like the IPR1 I picked up a while back, when a hollow Indie IPR came up I couldn't resist it. That it looks stunning always helps.
Body: Solid mahogany/hollow body
Body Top: Best quality quilted maple
Body Binding: Single cream
Neck: Canadian hard maple
Neck Binding: Single cream
Neck Construction: Set neck
Fingerboard: A-grade ebony
Fingerboard Inlay: 5mm dot abalone
Headstock Binding: Single cream
Head Machine: Grover tuner
Top Nut: Graphite
Pickups: 2 alnico humbucker
Electrics: 1 volume, 1 tone, 3-way toggle switch
Truss Rod: 2-way dual action
Scale Length/Frets: 648mm(25.5")/24 frets
As far as I know, it's constructed in the same manner as a 335 i.e. a solid body guitar that's been partially routed out and had a top put on. Obviously it's visually similar to a PRS hollowbody but it's not had quite as much wood removed, having the full 335 style sustain block down the middle of the guitar.
Playing wise it's definitely not a 'semi acoustic' in the sense that you could use it unplugged, there's only a tiny bit more acoustic volume than something like a Les Paul. However it does have a lot more warmth so if played acoustically it loses the sometimes rattly sound of an unplugged electric.
Plugged in it does the classic twin humbucker thing nicely. I'll have to do a back to back comparison with the IPR1 and some other solid body Indies to see if I can better pick out what the hollow body brings to the sound.
It's definitely not something to stick EMGs in though. ;-)