Everyone tells you to go to a boot fitter, but for a lot of us, dropping
 a fortune on brand new boots is crazy when you can find deals online.
Check a lot of sizing charts, and make sure you know your actual shoe size, not the size that is printed on your pair of skate shoes, but the actual size. For example, I wear between a 9 and 10 in most shoes, but I'm better suited for a ski boot that is an 8.5 or 9 (the size that those metal things in shoe stores tell me I am).
I've bought boots on the interwebs before. I was tired of getting shin bang, so I bought a used pair of full tilts off a friend. I'd never tried them on, but they were the right size, and I haven't looked back. They fit fine, and effectively ended the shin bang my technica boots gave me.
As long as the liner is moldable, and the boot shell doesn't have gargantuan amounts of space, you will likely be fine. Remember, smaller is better than bigger, liners will pack out, but shells will never shrink.
You might not get as good of results as the rich kid who got FT's professionally fitted. But you also didn't drop 600+ on a pair of ski boots.
As for these boots in particular, I know nothing about them. They look decent. Intuition makes solid liners, and that strap looks beefy. As long as you don't have wide feet, I bet they would work well.