After a long time, I'm finally deciding to review Chimneys... Being their tenants was one of the worst experience in our life.
It went wrong from the very beginning, back in 2008 : because they suspected our mover to be untrustworthy, they refused to hand over the keys on the agreed date and we had to spend the night in a hotel. To sort that out we had to withdraw as much money as possible to pay them cash because they wouldn't wait for the bank transfer to go through - and we could not afford another hotel night.
It sort of improved after that, mainly because we very seldom had to deal with them.
Things went wrong again when planning to leave, some 2.5 years after. We had to move before the end of our term, and tried to arrange a checkout earlier because we could not come back to the UK just for that. They refused. We tried to arrange for a sollicitor to attend the checkout on our behalf. The mere mention of the word "sollicitor" was to them a declaration of war. Communication, which was incredibly irrespectful, entirely stopped and they would not deal with us at all - which was quite bad considering they owed us our £1200 deposit and £300 overpaid rent.
We managed to claim our deposit back through the Deposit Registration Scheme (TDS), and we won on the ground that Chimneys had behaved badly (checkout had never been conducted).
We then complained further to the Property Ombudsman, and eventually got back the rest of the money they owed us + some more as compensation for having been treated so poorly. During the complaint process, the argumentations and explanations they've sent was full of lies, insults and accusations.
As someone said below, when people read these reviews most of the harm is already done. Yet everyone ought to know how bad they are. I would then encourage anyone having had a bad experience with these people to do all they can to complain. There are limits to what a human being can do to another, and Chimneys clearly need to learn those limits.