hi, the crossfires are a newer version of the sidi 'flexforce',[which i use] and if the newer ones are as good as the old ones definately a good quality buy!. iirc nick was using a pair of crossfires on our trip

im on my second pair i normally kill a pair of boots in 18 months,[these about 3 years] gearn alpinstrs they just get worn out,as the flexforce are no longer made i picked up a 2nd hand pair on ebay as new! result

yes they can be stiff in use, slow and ponderous to put on but the level of protection is pretty high, most exterior panels adjustable/replaceable and for a offroad boot fairly waterproof, certainly a lot better than alpinest.check with nick

bye