I stayed in fiesta hotel playa d'en bossa last year........it was very good, clean, reasonale rates, well located.
Fiesta have heaps of hotels on the island to choose from, different star ratings and different prices. Check them out.
As long as you find a hotel that is decently priced, grab it. Most 2 and 3 star hotels are fine. I spent 3-4 hours in my hotel each day..........i basically only slept there.