I have tried them all - well, at least lots of them.
Ten years ago I got a pair of Tecnica XT 17's and put a pair of Doberman leather race liners in them. The ones that look like boxing boots. Great fit but wicked cold. Like wearing a leather sock.
After a few years I made the mistake of getting into a pair of Dalbello Krypton's. Nothing wrong with the boot except that it was just not right shape for my foot. So I got a pair of Intuition Power Wraps for them. I had them fitted five times without success. Major toes crunch. I took everything from a hammer to a blow torch to them and ultimately just cut the toes box out. Problem was that I was in between sizes. The 8 was too small and the 9 too big. I got out of those three years ago after trying on a pair of Nordica Doberman's. I did not care for the stock liner so went back to the old leather liners that had served me well years ago. I used those until this year. They were just played out. And there was no way the Intuitions would fit into those low volume boots.
I had been hoping to try a pair of Zipfit's for a while but I would not pay the $350 for them. I kept an eye out on Ebay and found a pair of used Grand Prix. Did the whole boil the shell thing and fitted them as instructed. No way because too much volume for the shell. This summer I picked up a pair of used Zipfit World Cup's which are the second lowest volume model.I did not do the recommended process before trying them out for the first time yesterday. Just did not get to it. Despite that, I think they will be the best of the lot for me.
First off, they are beautifully made - in Italy, I believe. I like the neoprene, flexible toe box rather than full leather as with the Doberman liners. Very sturdy. Great quality materials and stitching. Really, quite beautiful.
Secondly, they fit my foot perfectly. I got the 26.5 size for the same size Nordica shell which is a minus 1.5 - 2 size for me. The auto-cinching lace does a very nice job of securing the entire boot. And I like the strap that closes the upper top of the boot without interfering with the shell closure.
Third, they go into the boot pretty well. Remember, with this kind of liner, you put it on your foot and then slip it all into the shell. That is no problem when it is all warm. It becomes a torturous challenge getting the foot out of the shell at the end of a cold day. And then the big Ahhhh.
These liners fill the boot and hold the foot like nothing I have felt. It is quite extraordinary to feel zero slop in the boot. And that is with a loosely buckled boot. Seems that the shell hold the liner and the liner holds the foot. Interesting.
For me, the litmus test of a good fit is how secure my heel is. With the Zipfits, there is no heel lift. I repeat. No heel lift even when you try.The cork material is considerably more dense than the Intuition foam. That is brilliant.
Conditions yesterday at Sugarloaf were hard packed/ice. I was on my go-to Hart Phoenix carvers (116/66/101). The combination of the boots and liners and skis were the perfect tool for the day. There was no conscious adjustment necessary. Big carved turns were solid. No chatter. Locked in. Even though I had not fitted the boots and literally was skiing a mile in the previous owner's shoes, they had a glove-like fit. I did get a fair amount of toe-crunch, because I was not far enough back in the heel. That should resolve once I do the fitting process and move some of the cork away from that area. I also had my footbeds in the liners which tend to shorten the fit.
The other main issue for me is how a liner fits around the shins. I am seriously shin challenged - of the chicken variety. Even though I have Booster straps, I would get shin bang with the old Doberman liners. I even had to put Insta Print tongue shims too take up the space between my leg and the boot. But not with the Zipfits. With the integrated strap cinched tight around the shin and the Booster strap secured, there is no daylight between my shin and the boot. This makes for a far more efficient boot as well. I did not have to bend to make first contact with the shell, and then apply leverage. Contact is there constantly. I think that is one reason for feeling that there is more efficiency between boot and leg.I was able to ski more upright for this reason and that has been a recent goal of mine.
At the end of the day, my first this year, I felt pretty good about the $50 I spent on these. I am sure I will feel better about them after a proper fitting.
Here is the greatest complement I can give any ski product. After trying out the Zipfits, even under less than optimal circumstances, I might have even paid retail for them
That being said, if you are interested, keep an eye out on Ebay. They do come up from time to time.
PS: By the way, some have asked if it is necessary to heat the boot every time to keep it molded. I found that just the heat from my foot molded the liner as I skied on it.