In my opinion, definitely.
Pros:
Massive gameplay, without the use of mods, you can have a 1000 unit cap. However, unlike other RTSs, this is literally a 1000 unit cap, each unit, be it a lowly T1 unit, a factory, or a stomping great monkeylord costs 1 unit cap.
Massive maps, the maps you play on actually require strategic thinking, they can be anywhere up to 81x81 km. those maps take the fastest surveillance aircraft over a minute to get from corner to corner.
Experimental (T4) units, no doubt you've seen the monkeylord along with the other experimentals . . . if not, go and take a look, it's all you need!
Multiplayer, multiplayer games is where Supcom comes into its own. Playing against the AI is all very well, but there is nothing like the challenge of battling another human. I have played games that took nearly four hours before now, and that was on a medium size map.
Sorian AI mod, If you don't have friends to play against, the mod is needed, the Sorian AI ups the difficulty of the AI something chronic, and makes the AI adaptive. More adaptive than Supcoms own so-called "Adaptive" AI
Cons:
System, you do need a good system to handle it.
AI, the in-built AI is pretty rubbish in my opinion, the adaptive AI is hard, but I havn't seen much of it's adaptiveness. The Sorian AI mod I mentioned above easily remedies this though
I can't think of any more cons off the top of my head, but then I am somewhat biased, I love the game!