I'm normally not into RTS's. I loved "Z" (from the Bitmap Brothers) when it came out, and the Myth serie, but I can't wrap my mind around micromanaging ressources and units. Nevertheless I bought Total Annihilation here after reading a few reviews and I fell in love. It's all pretty straight forward in terms of ressource managements : build energy collectors, ressource storage enhancements, watch your supply plies grow without any further ~work~.
The mobile units are similarly easy to handle, have relatively fine grained controls and an adequate AI and pathfinding which means you don't have to constantly control whether units are blocked somewhere or are attacking single handedly massive opposing forces.
graphics and sound are a bit dated (especially the cheesy voice-over in the campaigns ;) but it doesn't hamper the really great gameplay.
As someone else stated : unless you're absolutely completely turned off by RTS's this game is worth buying. For an RTS, it's nearly ~relaxing~ and it's pure fun.