I've been riding for about 8 years now, and with my previous pairs of boots I was never really all that happy.
This year's Ions changed all that. Solid boot, very comfortable, and quite stiff, which is great for transferring power from your feet into the board. I was a bit worried about my wide feet, but I've had no problems whatsoever. Not as pricey as the SLX, which is also a plus, but I still wish they were a little bit cheaper. Speed Zone is something you either love or hate- for me, I've been liking the fit and being able to save a few minutes here and there putting on my boots.
They start to pack out after a couple days, which is definitely nice; I've been holding off new boots for a while just because my old pairs took so long to break in.
The Imprint 4 liner is designed to hold together with age and use, and while that seems true so far, only time will tell.
Like I said, only real con is the price. But if you really want I good boot that won't totally decimate your wallet, I think the Ion is one of the best boots on the market.