After 4 years with my Marin Rift Zone, I've downgraded/upgraded from
FS to hardtail. I finally got fed up with cleaning the (English) mud
off the rear sus gubbins (and I know it is one of the simpler, low
maintenance FS set-ups), no brakes after hitting mud and no sensible
frame bottle cage mount (I hate back packs). So I've bought a Kona
Caldera (expensive for what it is but the LBS gave me a 20% discount
without being asked – I've bought loads of kids bike from them over
the years) with Hayes disk brakes. Now, I almost go looking for mud
because the brakes are unaffected and the frame is easy to clean. I
can also get a drink from the bottle in the sensible frame cage.
Although the Marin frame is a 15+1/2, I think the stem was too long
for me and I was getting backache. The 16 inch Kona is much more
comfortable (for me) and I'm doing my standard ride a bit faster,
riding quite a few more miles overall and my climbing is definitely
better.
I'm not saying that the Kona is better than the Marin (I think it's a
bit heavier for one thing, probably the wheels, and I do get the odd
jolt where I would welcome a few inches of rear sus travel) but
overall, the fit and the simplicity suit my needs.
I might be one of the few people who have moved from a FS to a
hardtail and cured my backache.