I have been ordering from Lenstore for years and I always appreciated fast delivery. This is important if you run out of lenses and you urgently need them the next day. I also contacted them at some point and mentioned as a passing comment that few of my contact lenses were unusable, I suspected damaged, however I didn't have any proof and it happened some time ago. They actually sent me three spare monthly lenses for free and apologised without any further questions.
I did notice that my eyes started being recently quite sore and I had to stop wearing contact lenses, however I can't comment if my eyes are very sensitive or it is due to the product quality. Different suppliers will produce different quality and the same applies to high street opticians. I had a good experience with Lenstore hence I will be changing contact lenses from monthly to daily and a different make, but again through Lenstore.