While the TMS definitely looks nice; I HATE how hard it is to gravel vac. It is a tedious chore to make sure you're not drawing it up into your siphon. I've tried small miniature vacs to slow down the water's flow, and I still get it. I have to continually pinch the hose to let the sand all fall out . . . but I still get it. It gets stuck in the water change bucket! Then stuck in the tub or toilet where I dump the water change . . . etc., etc. Then, it doesn't all easily rinse out of the tub. I've taken to letting the tub completely dry, then sweeping it all up! UGH!!!!!!!!!!!!
Yeah, granted, you don't need to gravel vac planted tanks all that much. Yet the finer grained the substrate is; the more debris just sits on top instead of sift down to the lower levels.
Unfortunately the tank that has TMS is on the second floor. I'm not risking carrying 2 or 3 gallons of water down a flight of stairs just to throw it outside in the grass. I can just see myself missing a step and making a big mess. I know myself enough . . . it's bound to happen!