Hello suncityga, good choice in stopping at Zaragoza. I will try my best to help you seeing as everything is fresh in my head still from the trip.
The hotel itself, I did not spend enough time in it to actually have a great input or advice to be honest. However, the staff were lovely and very friendly/helpful. The only thing I did not like about my room specifically is that it was two single beds and the shower made a really loud noise when the hot water was on (was also very slow) but other than that I can not complain specially when I was not planning to sleep in all day. I did not use their food service but it looks very good from what I can see however I really would recommend to just go and eat out because there are loads of places and much cheaper. The hotel is very decent from the inside but looks normal from the outside, I liked it.. and the location can not be any more perfect.
As for what I or me and my girlfriend enjoyed most.. I would say I had a soft spot for the 'Plaza La Princesa' park. We went for a walk to see the Zaragoza football stadium and did not know of this place.. the stadium was shut and not really worth visiting however opposite of it we saw the park and had a walk.. it is brilliant with a very nice king statue at the top. It is number 51 and 35 on the map if you pick it up from the reception (assuming they'd still have the same map still when you go). I also loved the Torero stadium for the fact that it is a well known Spanish history etc.. but again, it was shut so I only saw it from the outside. I believe there is something going on in October so check it out!! It is number 53 on the map and not too far from the hotel.
Also check out the church on the main square, which is less than 4 minutes walk from the hotel.. it is very impressive and you really can not miss it. I did take a route, pretty much followed the map we were given. The first day I spent seeing the main sights and old town including south of the map and on the second day we crossed the bridge to the other side where they have the Expo 2008 buildings and other cool things to see then walked back to the square again to enjoy some more food before we had an amazing Sangria on Plaza Espana near the fountain.
If you need to know anything else let me know. You can see a lot in two days if you enjoy walking like us :)