I have no idea what your travel habits are, and I have no vested interest in it (other than being a subscriber), but my guess is you'll be surprised how much you use ET. It's by far the best $100 I've spent as far as ROI...

R availability is one thing (which hopefully united will sort out on its own, so UGs will clear correctly and you won't have to watch), but If you ever use miles for flights, the saver award alerts are terrific for finding seats which open up, saving some serious miles. Even helps if you've already booked standard awards, as you can change once you've booked.