I have recently ordered some bits and pieces from MMB, (as I have in the past).
I have a laptop running a Windows 10 plain vanilla setup, and accessed the website with no problems using the link in the Traders Section. All working fine, website easy to use.
Order took a little longer than usual to turn up, but don't forget that there have been a number of one and two day strikes by the posties. Order turned up with all the stuff, excellent quality, well packaged, with paperwork.
All good!
Mike