We stayed at the Kuum Hotel for four nights recently in June 2010. The hotel's interior and exterior is gorgeous. The room overlooks the Aegean Sea with ceiling-floor windows, designed in rather cement-y tones like grey and slate; minimalist concept. We stayed in the small room but it was still huge. Bathroom has a rain shower, all round glass walls (perfect for a romantic getaway). The hotel is well spread with heaps of lush greenery. The sea is the pool, although there is another indoor pool in the spa.
The last review on this hotel was written in February. I am guessing they have made some improvements in the interim. A majority of the staff now speak fairly decent English. Sure there are some miscommunications and misunderstandings here and there, but in an area that hardly speaks English, they are doing pretty well. They are sincerely apologetic when they don't get you, and strive to help--all with a smile. You definitely do not need a manager to order a Coke anymore. Besides, they are overstaffed as the hotel is not very packed, which means that they tend to serve you a group (without being in your face). Surely one person in that group will understand. I wouldn't worry too much about the language barrier as highlighted in previous reviews.
However my only qualm with the hotel is that things are majorly overpriced, as noted in the previous reviews. The spa is fine, expect to find the same prices as in London. But, food is rather pricy. Not to worry though, as my partner and I managed to find two nearby towns with ample delicious Turkish food, for the price of one main course at the hotel. And it definitely tastes more authentic. It's about a 5-20 minute walk depending on which town you go to, with supermarkets and stuff so you can get your bottled water, etc. there.
All in all, it's a gorgeous place. Don't be put off by the service/language reviews as below as it seems that this has all changed. In any case, you'll probably be stuck in the beautiful room for most of the day and thus don't need to deal with anyone. And if you do go down to the sunbeds deck (which, again, I believe is due to a change of policy, there are no 'outsiders' sprawling around after a particular time, as mentioned in the previous reviews. There were heaps of sunbeds that were unoccupied), there are quite a lot of waiters/waitresses at the bar who can and do speak English.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC