I have used Carwardines for a while now and having tried several accountants previously I am happy to stay put here.
I run a small business and have received good and helpful advice on that and my personal tax situation that has saved me a significant amount of money that I was giving away every year.
I guess it depends what you are looking for. If it's a cheap and cheerful accountant that works through the standard stuff then fine, but I wanted a more in depth and ultimately more valuable relationship.