I've just returned from thrashing my Banshee x round kirroughtree, without any problems at all, it just sucked up everything the black could throw at it.
Yes it's heavy but fitness closes the gap with other bikes, and you can carry more inertia. 😉 on the way back down.
The bike had all the important stuff threadlocked when new, just checked them now and nothing has budged, in fact nothing that hasn't been threadlocked is loose, but then again I check the bike regularly.
What I will say is when I got it from Halfords some parts were loose and needed tightening, the kit itself is good, often the way it leaves the shop is very poor.