We had tried selling via two other agents and found that they inflated the value of our flat in order to get our business, and were then unable to generate enough interest in it. We therefore contacted No-Flies, and they gave us a realistic valuation, based on a file of evidence which they have carefully compiled and took us through. We then put our flat on the market with them and had a flurry of interest, and accepted an offer at the asking price within a week.
Brendan and Tony were always responsive, friendly and helpful, offering sensible and pragmatic advice all the way through the process. They also have experience of working for high street agents, and have deliberately avoided repeating the annoying traits that they witnessed during that time. For example, they they are happy to liaise by email rather than pester us by phone all the time (though they were also happy to do a phone call or home visit too), they showed contractors into the flat if we were at work, and they avoided the usual estate agent patter. And of course they are also much cheaper. Wouldn't hesitate to use them again, whether buying or selling (and that is saying something given that we generally have a low opinion of estate agents in light of our experiences in the past).