My friend stayed there last year and he had no problems, the apartments were clean but basic, and most have good views of the beach or the pool. If you want non-fancy cheap apartments then I'd recommend here. They're situated at the end of Figuretas beach, its about a half hour walk to PDB, and about a 20min walk to Ibiza Town.
They're part of the Lux-Mar complex, so maybe do a search on that, more should come up.