It depends on expectations.
For me, it's about what i expected.
I loooove the first Tron, but it's deeper themes are highly overrated and i like it more for it's creative cheesyness.
The second one, while not being as fun concept-wise, had a much tighter pacing (Tron 1 is sometimes just boring), brings in new cheesy ideas, and makes about as much sense as the first one, wich is not much.
That said, thanks to being a more conventional movie, it lacks some of the fun and escapism-angle of the original. But it has a nice soundtrack and some fun actors to make up for it, so yeah, worth a watch in my opinion