The Boots website is terrible, it's slow and hard to navigate, and yesterday I was trying to buy some '3 for 2 Christmas Offers' and although I selected ones that were marked as offers when I added them to my basket it didn't mark any as 'free' and I noticed that they didn't go into the basket as '3 for 2' even though they were on the website. I had to keep guessing which would be accepted and taking them out of my basket if they weren't recognised. Today I tried again and it crashed with a message saying 'generic error' and telling me to log back in with the same device I was already logged on with - no idea why it thought something had changed in the 10 seconds it took for that message to appear.
I've also had problems with ordering and having items delivered to store - about half the time I don't get an email telling me my items have arrived and have to go into the store to check.