I wear very thin trouser socks. I just switched to a Jackson boot from SP Teri. I hated the way my SP Teris felt without any sock. My feet would sweat and get stuck to the little insole and it was uncomfortable on the top of my foot. The insole and lining of the Jacksons are so comfortable. When I got fitted, I forgot my socks, so was fitted in bare feet and the boots felt so good that I think I could skate barefoot in these boots if I had to.
I always go down in width in skates. With SP Teri, I measured a B width, but was always perfectly comfortable with the A width. With my Jacksons, I measured a D width, but got the B width. The fitter said that my foot is flatter than most, so with the "correct" width, I would have too much room above my foot. I am not experiencing cramping or pain on the outside of my foot at any time.
I used to get cramps in the arch all the time in my old SP Teris due to my high arch and the lower arch of the boot. This has not been a problem in my new Jacksons.
I had custom SP Teris and I was never really happy with them. My Jacksons are a stock boot and, so far, fit me better.