I have demo’d a 5c and own a 6c, both amazing bikes, you would not be disappointed, the 5 is more playful and fun, the 6 is a root eating monster. for the vast majority of trails the 5 is all you need, it you like very steep stuff the 5 will manage well, but the 6 likes it better. The switch infinity is strangely (I don’t know how it works, it just does) amazing both climb very well, my 6c much better than my old 140mm bike and the 5c better again. All bikes can break I snapped my alloy norco last year, and I know someone that snapped a rear swing arm on an orange 5, even though that does seem impossible. I am writing this with a smashed shoulder after taking the 6c over a good sized drop, that I had ridden before and stacking it, total rider error, the bike bounced, hit rocks, a tree, made some weird carbon fibre hollow noises, but is total fine unlike me, I have checked it 3 times, to be sure. I cant say a yeti won’t break but then the same goes for any bike, and they do have a 5 yr warranty if it happens.