I usually get shoes resoled at Llanberis Resoles. I have had them done at other places over the years but I keep going back to Torquil. Like Nai says, it is pretty much better than getting a new pair. Like getting a new pair you don't have to break in.
I only tend to resole once per pair as they are usually too shagged by the time the resole wears out.
I have 3 pairs of my preffered shoe on the go at the moment. They are each a half size different to the other and actually i find it works really well. I mostly climb in the bigger two pairs with the small one for particularly tiny foot holds.
Miura VS by the way.