On some temporary layouts, I have used Realtrax from starter sets and have had very few problems with it. As you say, putting it together and taking it apart frequently could be problematic over time, I think, but could be done with a little experience, finesse and patience.
Personally, I think all track systems are basically good, but they all have some quirks. Good news is the quirks can be worked around with a little patience and the good tips from others here that are using the same track type. I have always liked the looks of Realtrax and Fastrack because of the built in roadbed. As you say, no ballasting!
