The ride isn't too firm, but it can be a bit uncomfortable on fairly rough roads. Max. drop is approx. 2" front and 2.5" rear (where they're presently set at), but can be adjusted higher.
The only issue i've encountered so far is that the rear springs knock over some bumps, but i'm pretty sure it's because i had to leave out the rubber upper spring mount during installation, since the stock mounts won't fit over the adjustment thread.
Also, i've currently got my sights set on this...
http://cgi.ebay.com/ebaymotors/TOYOTA-08-0...sQ5fAccessories