I too use photobox 90% of the time now. I used to use a local printer but he has now moved away and photobox are far quicker and cheaper than the next local guy.
The other thing about photobox is that if you have any qualms about quality or colour, then they will reprint the images immediately and post them asap. Always get the ICC profile from the printer you end up using so at least you know that what you see on screen is what you get.