I recently purchased a single-speed freewheel, and admittedly bought from SJS as they were the cheapest. The part was delivered very quickly, and fitted the bike perfectly.
Unfortunately, the freewheel failed on its first use. I contacted SJS via email, and the staff replied very promptly and offered a resolution which was most convenient for me! In fairness to them, it was the cheapest version of arrange of similar items they stock, so probably wasn't intended as a 'robust' part.
Delighted with the service, couldn't ask for more!
Excellent service at a competitive price and fast delivery to the Scottish Highlands without delivery cost excess. Much appreciated and will use again without hesitation. (edit) I have since used again with the same excellent service.