Hiya,
Me and a friend stayed there from Sept 24th for a week. The hotel was brilliant. It's situation is perfect - only 2 mins from Eden and Es Paradis and 10 mins from the West End (and that's coming from two girls stumbling in high heels!)
To be honest, we didn't spend too much time at the hotel itself.
We were B&B, so made sure we got down to the restaurant for breakfast each morning before 10.30 (even after only a couple of hours sleep!) The food is fine - there's quite a choice at breakfast (fry up, cereal, fruit etc).
The cleaners came every day if you wanted, but were happy to leave you alone if you were still in bed.
The reception staff did well to put up with us as we came in in quite a bad state most mornings.
The only complaint us 2 girlies had was that our room (212) was quite dark. There's only one light on the wall above the beds, so putting our slap on ready to go out each night was quite difficult with little more than moonlight to do it by!
We went at the end of the season, so the hotel had quite a mix of people. I would guess that there's far more younger guests during the peak times.
I would definitely recommend Hotel Pacific to others and would stay here again if I find myself in Ibiza.
Hope you have a wicked time!