I demo’d the Aeris 145 back in January and promptly bought one (GX, 160mm Boost Lyriks, Super Deluxe rear shock) based on a number of points:
The way it rode – I wrote a mini review of it on here somewhere.
The frame – the level of detail that the guys at Bird have thought about is unbelievable. Almost everything on the bike has been designed and engineered to the nth degree. Ben spent time showing me the leverage curves and explaining how they’d arrived at the shock tune they had, the way the seatstay top section was machined as one piece for stiffness, etc.
The warranty – lifetime transferable, yes please. Having heard so many good stories of Bird bending over backwards to help customers out really reassured me.
The geometry – having followed the development of the Pole Evolink, Mondraker’s Forward Geometry and the Mojo Geometron, I wanted something with properly long proportions (in Large size).
I’ve yet to regret my decision..