I am going to Nikiforo 7th June and have booked with Sunset Holidays (owned by Thomas Cook, I believe), if this is any help.
Just returned from Nikiforos on Monday night and re-booked for September on Tuesday morning, enough said! Nikiforos and his family are friendly and welcoming and I felt very safe there as a lone traveller. The apartments are ideally situated, 2 minutes walk to the harbour and same again to main square via a shortcut. The pool was very clean as was the bar. Ideal for couples and families alike - would highly recommend.
Nikiforos apartments are ideally situated for both the harbour and the square. They are a two minute walk from the middle of the harbour (up the track at the side of Uncle Simi restaurant) and also just a couple of minutes from the square via a short cut at the side of the pool. Nikiforos and Tasulla are lovely and welcoming. The apartments are clean and the pool and bar area very good. Hope you have a great time.