>>10593873Unitrack can be held down with just some adhesive glue, going from past experience (pic related) it holds pretty well.
>>10595465Like the other anon said it's by far the best N scale track system out there in terms of ease of setup and operation. I agree too that there's a few key missing track pieces out there (Double slips, curved turnouts) and that leaves me from calling it the best overall, but the track library is large enough that you can still work around the lack of those parts and make something excellent.