I was laughed at when bought a lifetime sub while it was still in beta. I think I've gotten my money's worth. Haven't had to spend a dime after that. At last count I have fifteen characters at max level with max'd gear.
The one star knock off is that it's hard to stay canon with the game. Granted staying canon would have reduced the excitement for the pewpew crowd, but for me I would much rather have the vanilla trek lots of chatting missions versus, go here go there and kill everything you see missions. Still it's closer to "real trek" than anything that's been on TV for the last few years.
For the whiners who complain that it is pay-to-win.. umm, yeah it is. It's a business not a charity. They don't get to run their servers for free. If you don't want to pay, write your own bloody game.