Generally speaking, yeah, it was pretty awesome. I have my problems with its ending; and even deeper ones with how Warren Ellis essentially got bored with it* and then had the nerve to get really annoyed when people he apparently wished to bilk out of about fifty bucks were bothered that it took him ten years of work and five years of cajoling to write the ending. Also the occasional problem with John Cassaday, who is also great, make no mistake, getting characters badly off-model, especially Jakita. (Yet never, of course, the Drummer.

)**
And I still can't exactly tell if 27, the epilogue, is just good or actually kind of great, though.
*And had an illness, yeah. But he wasn't too sick to do a bunch of other stuff in the meantime, and frankly it's not like Planetary was a really complex, Watchmen-hard story at its heart. It had a shitton of secondary material to include--which is what made it interesting--but after issue 12 and especially after the Opak Re issue it was no longer a mystery story, and hence seems like it would have been rather straightforward to conclude, especially given how Ellis
did conclude the Snow/Dowling conflict in 26, which was in a manner straightforward-to-a-fault, with an anticlimax so fierce and a final battle so poorly done it was likely intentional--either as a fuck you to whiners, a complete lack of care, or as a deliberate thematic choice, it's hard to say. You can argue all pretty effectively.
**You know, I probably wouldn't even mention that kind of needling crap for an artist of a lesser caliber, to be honest. I mean, if Greg Land's tracing Sierra Sinn for Susan Storm one minute and Sasha Gray the next, I don't complain, because I know he's a hack. Cassaday by contrast is one of the best working artists, so when he doesn't do his best, it shows more. High expectations are kind of a double-edged sword, I suppose.