Not being able to understand lecturers/tutors?Watch
I attended an open day from England and when asking questions about the university I struggled to understand a little.
Has anybody found this a problem or should it not alter my choice?
If you spend a bit of time up here you will probably get used to it. A lot of courses at Edinburgh have a majority of non-Scottish students, so the lecturers are aware that they need to speak clearly.
I don't see it of much of a real problem. Even if it were you get used to accents pretty quick.
If you think it'll be a problem for you because you haven't been exposed to Scottish accents before, there are plenty of online resources where you can hear different varieties of Scottish accent. BBC Scotland radio, podcasts, Youtube videos of comedians e.g. Kevin Bridges, Youtube videos of Scottish lecturers and academics.
Obviously you should try to find something you're actually interested in!