If you are the owner of a holiday cottage, please do not use this company! I have had two terrible experiences with them this year after I gave them 6 months notice that I wanted to stop using Sykes from a lack of bookings. They make it really difficult for you to leave by the way, and there are steep penalties if you want to stop using them straight away. 

They booked in a couple of very undesirable guests in March, working girls who worked in clubs very late at night who were using my annex not as a holiday base but as their place of business. They were not screened at all. These "guests" stole and broke things. Sykes basically said it was my problem to sort and they couldn't do anything about it! So much for their customer service!
 A few days before my 6 month period was coming to an end, they took a phone call apparently from a potential guest who wanted to stay the following night. They didn't call me to check that was okay as my cottage might not have been ready, and in fact it was already booked up. My guest was understandably very upset when they turned up, and we both tried to call and complain to Sykes. They don't take calls at the weekend. We were both charged by Skyes though, me a cancellation fee and my guests for not being taking up their booking! Basically they were charging us for for their lack of common sense/unprofessionalism. Worse, it turns out they lied to my guests which I am furious about, stating that they had spoken to me and I had said it was fine for them to stay!! The whole experience with Sykes has been underwhelming to say the least. A lack of bookings. A lack of care. A lack of professionalism. The only winners are Sykes who charge people for whether they stay in your cottage or not!