I bought my spankin new megrez 90 from him only a few weeks ago.
I found that the best way to go about purchasing is to skim the website, and call to make sure Matthew can get the stuff for you (and to confirm prices due to exchange rates fluctuations).
The website does take a bit of getting used to, but once you work out it's foibles, it does have an awful lot of information as to what you can get through this mob.
I had to wait a little while to receive my order, but that's nothing unusual as it had to be shipped in from overseas. It would have been the same, no matter who I'd bought through. Matthew kept me up to date on the progress, and I'd almost always get a response to my email enquiries within 24 hours (often in less than 12. I was very impressed with how quick he'd follow up on my queries).
I have had a problem with my scope, but that appears to be a manufacturing issue, NOT the fault of the dealer. So far, Matthew has been quite helpful in assisting me and working with William Optics to get it sorted out. If it all goes horribly pear shaped with after purchase care, I'll let you know.
However, I have to say that it's been very good so far.