Yeah, it's worth playing. Not great, but it's a good solid modern parkland course. The place in general feels a little American, and it shouldn't take the place of a round at one of the real-deal heathlanders in Surrey or Sussex. But there's a very nice hotel, bar, lounge areas full of stylish London girls up for a day spa. You can basically get to the Grove on the Tube, which I view as a plus.
I enjoyed my day trip there from my friend's place in Hampstead. Worth a look.