In reply to Bjartur í Sumarhús:
I have only used the 2, I have heard that the 3 is slightly longer lasting.
Huge heel lift for an off road shoe, I know people who have had serious problems with this, I have not always felt comfortable on technical terrain.
Probably better in the mud than Kanadias, but nothing like as good a X-talon or Mudclaw studs.
Wore through mine quite quickly, both soles and uppers.