I've booked there for this year. Last year we stayed two doors down at Odyssey Residence (similar set up). Not sure about what you mean by "safe". The area didn't make me feel unsafe in the least. It's a bit away from the "action" which makes it quieter. 5-10 minute walk to beach and/or the start of the prom. Dolmus passes by about 50 yards down (1 every few minutes). The only issue is the walk back from the prom to the hotel at night. It's not that dangerous (not much traffic) and the road is wide, but you might like to take a small torch for when it's dark (I waved a mobile phone around)
We went into Diana Residence last year to have a mooch around. The apartments and pool look great (we've also gone for a humungous 3-bed aprtment). The staff seemed very pleasant and the guests we spoke to seemed to really love it - many were repeat visitors. We resolved at that point to try for the Diana for the following year. The Odyssey was great, I think Diana will be better (unless they serially overbook, like Odyssey did).
