I use the STD Gauge Realtrax on my somewhat plush carpeted floor at Christmas time. For that, I wouldn't use anything else.
A few reasons I like Realtrax:
Realtrax stays together without pulling apart.
If you desire, traditional "O" track pins will fit inside the Realtrax rails for better connection.
It is more stable on the carpeted floor than traditional track.
Easy to assemble and place around back of tree where it is hard to reach.
I like the look of the light-colored roadbed on my white sheet giving the appearance of snow.
Grease/oil or rubber tire dust stays off the carpet (or sheet in my case).
IF I was to install a permanent layout, I would use the traditional extra-tie track and look into the USA track brand.
