the SPK is solely for park. dont expect to get the preformance you want out of them ripping down a groomer at 50mph, infact with those boots, i wouldn't even want to try. as for head, they have awesome boots right now, heat molding etc. great fit with so much more versatility and support throughout the day. that being said i wouldn't mind having a pair of SPK boots on an all park day. they're suuuper soft thus why they dont give you shin bang, one of their more marketable characteristics of that model. additionally, with the softness of the SPK, on hardpack, you're not going to get the responsiveness out of the boot you're most likely looking for because it flexes more than your ordinary boot, the SPK is not .....your ordinary.... boot. my advice, dont get them if you like to ski hard all day, especially BC (cliffs), lol. baaad idea, or more fairly, just not as good of an idea as with other boots like head, nordica, etc. SPK was generated solely to tap into the park skiing market. theres so many better boots out there that fit both the comfurt and preformance levels that most people look for. SPK is money in the park don't knock that aspect.