I built up a 29er from a Cotic Solaris frame a couple of months ago, took it round the Monkey Trail at Cannock for the 1st time yesterday & was stunned at how it flattered an old-fart rider like me. Loads of fun, really fast (I’d say Cannock hard pack is a good surface for a 29er)
The only draw back is the length of the bike & unweildyness, The tight hairpins were a bit of a pain.
For more old fashioned mountainbiking i have found it to be great.
I’m thinking of selling my Sata Cruz Superlight 26″ – I just can’t see when I’m going to use now.