The main criticisms that apply to Barney's Mind (and to a lesser extent Shephard's Mind) are its dated contemporary references, uneven characterisation (sometimes he talks like Freeman or references things a scientist would be more likely to know, other times he plays the dumb card, and in general he doesn't actually do anything security guard-like) and generic dialogue (which in part I think can be attributed to Ian recording it live without breaks or edits and very little scripting leading to him having to think up lines on the fly).
With all that said though, no I don't think it sucked.
I think it was kinda meh. Also, Shephard's Mind was pretty good.