I'll cut and paste this from a thread a few days ago:
I've raved on here about my 2yr old Genesis Altitude many times. Excellent feel to it - I have no doubt that the Latitude feels just as good.
However!
About a month ago my rear mech hanger folded up wrecking the rear mech. I was climbing a short section of fairly steep stuff, didn't hit anything. As far as I'm aware I haven't bent the hanger previously, and the gears were fine up until the point the hanger went.
And of course it's not replaceable.
Now back in the 90s I had this happen to 2 steel frames (after actual collisions with roots/branches). I had the hangers straightened but they both folded irreparably soon after, so I'm aware that it can be repaired but rather annoyed that I can't trust the frame anymore.
The day after the frame bent, I sent a message to Genesis through their website asking if they would consider covering this on their warranty. I wasn't very hopeful, but you can only try.
I didn't get a reply to that message for 11 days. ELEVEN! Of course it was just a fob-off, saying take it to the retailer.
By this time I had already spoken to the LBS who basically said, 'fat chance, it's a 2 yr old frame, they won't warranty it'.
I have now had the frame straightened, but don't know whether this will bend again. One 853 frame which is now worthless.
So, to summarise, it's a steel frame with an integral mech hanger which may not be strong enough to cope with normal riding. I'd question why it doesn't have a replaceable hanger, or why Genesis haven't made this area strong enough to cope.
Secondly, I won't be buying a Genesis again, simply because of the terrible customer service. 11 days to reply to a pretty simple email is appalling. I'd be feeling a lot less aggrieved if they could have fired off a quick, sensible reply.
So, good bike, but be careful.