Purchased a pair of Nordica Speedmachine 110s in the spring (got a very good deal on them) in a 25.5. Did my own shell fit and they were fine in both length and width. Took them into the bootfitter for an initial fitting and he heated the liners, put my custom footbeds in, and made a few other tweaks and they feel snug but comfortable...maybe too comfortable. The bootfitter mentioned that the boots will "get big" and mentioned that there is a possibility I will need shims after the linings pack out. He did confirm that the shell size was correct on them.
Previous pair of boots are Tecnica Diablo Flames in shell 25/25.5. Old boots took more work in the footbeds, lining and shell grinding/stretching to get comfortable...really only felt good all around after a few seasons.
If the new boots do need to be shimmed at some point in the future is that a bad thing?
Please note that I completely trust my bootfitter and I know he would not have worked on the boots if they were not the right size. It's just that my last pair were nowhere near as comfortable after the initial fitting...