I used RealTrax for a small holiday(s) layout that was setup and taken down a couple of times a year.
I found the track not to hold well over time (staying together & electrical)
As others have said ... if you have it, use it. but I wouldn't use it for anything other than a permanent-type layout.
IMO, RealTrax is by far the least attractive and least useful of the four other major track systems: Atlas, Ross, Gargraves, Fastrack.