I ride a Mongoose Tyax Elite, I have done quite a few upgrades since I bought it..
1, New Rock Shox Reba.
2, New Mavic CrossRide Wheels.
3, New Shimano Diore Hollowtech Crank.
4, New Gusset Pedals.
5, New 180mm front rotor.
6, New Saddle.
7, New Kenda Tyres.
In all very happy with the bike, few tweets here and there but really like the bike!