Personally I would never buy a Snap-on box, I'm more in the Lista crowd. But I understand why people do buy Snap-On; they make a high quality product, and you pay a premium to have the awesome logo and all the bragging rights that comes with it.
And Lista has older product that is no longer supported... certainly something to keep in mind when looking at those 10+ year old Lista boxes selling for a significant fraction of new.
I've had a ton of different boxes from Snap-On and other good ones. When I acquired (almost by accident) a Lista cabinet, it was totally night and day better than my Snap-On's, I put the S-O's up for sale and now only have Lista, Vidmar, Lyon, Nu-Era type cabinets. I think I now have around 60 drawers worth filled.
Warranty? You wont really need one, they are so over built, if a bomb went off in your shop, a lista will most likely survive it. Theyre drawers are rated 400 lbs per drawer and super simple to service yourself cheaply and glide closed with your pinky, full loaded with 100's of pounds.
They don't have those **** sliders that Snap-On and other similar cabinets have that are weak points, go bad and needs tweaking. I laugh now at what they charge for those cabinets after having Lista's. I'll never go back.
ICON is going after that automative mechanic market who's culture is use to spending and financing their image (I mean tool box) to keep up with the jones's. Sorry but I scratch my head why they spend so much on them, I do get needing to fiancee when starting out but man is it ultra-pricey (the Vig) for the general mechanic; it's kind of sad. HF looks to be tapping into that in a serious way.
If you look at mechanics that work on more substantial, more expensive and critical equipment, they'll have Lista's over Snap-on. F1 racing teams, military, aviation and space manufacturers favor Lista type tool cabinets, there's good reason for it. Of course, Snap-On does sponsor lot of groups and why you see them often in NASCAR and such, they're not terrible.
ICON competing against S-O in their own market is smart, there's room for it; especially when doing the finance thing, its an ultra money maker for sellers if you can get into that racket. It's like taking candy from a baby.
But HF needs to step up and service customers like S-O, I don't think there remotely up to that task and perhaps overcharging but I'm sure they'll learn as they go and improve. S-O's warranty is getting worse and worse unless you work at a dealership and the truck goes to you often and your financing with them. But for a shop not on their route or at a dealership, then getting that warranty for a cabinet honored is much tougher and you'll will most likely will have to call HQ and deal with it that way than than get it from a truck.
It's too early tell if ICON is doing a good job or not for the price. More time is needed, they're new from a company that is well known to be the very cheapest and not no questions asked warranty friendly. I dont think it's in their DNA yet