The best ISP I have ever used.

Since the very early days of the web when CIX and AOL was about all there was. I've swapped ISPs between AOL, BT, Sky and TalkTalk and am now with Direct Save for the first time. The reviews for Direct Save on many sites are really not representative of the service I have experienced in the first 6 months of being a customer. Perhaps connection reliability isn't perfect, but it's no worse than Talk Talk, and a lot better than my Sky experience. I'm on fibre for the first time so the comparison may not be quite fair.
Yes, connections speeds fluctuate for the first week, and can at times be slower than copper, but they openly say that from the outset, and within a few days speed increases to approach the quoted maximum. Today (Fri 30/09/16 12:00) I am getting 36.2 Mbs on a 38Mbs contract.
Twice now I have needed to call them with an issue. They answer the phone within a minute of dialling and have always phoned me back when they said they would. They have swiftly and efficiently solved the problem on both occasions. They are very polite, keep accurate records. They listen carefully and act honestly and reliably without fob-offs, misdirection or bull, explaining the reasoning behind their actions and instructions and admit fault if the problem is down to themselves. The operators don't use a script and openly pass the issue on to a more experienced engineer if and as soon as the issue exceeds their level of knowledge.
As far as costs are concerned, they may not be the cheapest, and they are certainly not expensive. They are within the same ballpark as everyone else. I value my internet connectivity more than to be content with the level of service I can expect from a cheap or even a 'free' ISP.

I am a very happy customer.

I have no personal or commercial interest in the company, it's agents or anyone who works there.