A few early Gen-1’s had Reg / Rec issues and a recall, a few early ones had clutch bolts work loose. Both should have been fixed long ago.
Most of the Gen-2 is no different to buying any other used bike .
For me….
The 08-12 is the last of the low tech brutes. No ABS.
A fraction lighter, a fraction less clutter, a fraction easier to do braided lines, and maybe a better feel at the lever.
The 13-20 does have Brembo calipers although not modern ones.
The ABS isn’t a big deal, it works but it’s still a quite crude and dated system. Only thing it gets you is a choice of a wider range of newer bikes. I rode several early and late Gen-2’s, then bought a 2011.