Yes I did!
I think Lund is a perfect little city. It's beautiful and clean and historic and has loads of lovely cafes and little shops. I have to say though, it's not as vibrant and "happening" as I assume Manchester is. There is quite a lot going on in the way of student nations (which you should look up on Wiki if you don't know what they are) and bars and "corridor" (halls) parties, especially amongst international students, and Swedes certainly know to have a good time (!), but there aren't massive clubs. Also the music on a night out is usually awful, but I'm pretty sure that's just Sweden!
I honestly do recommend it, but as I'm not a massive clubber myself it's hard for me to estimate how you might find it
I actually, er, never went out in Malmo (haha) - but apparently it's really good. It is the third largest city in Sweden! (Though you should remember that Sweden has a population of 9 million.) Copenhagen is meant to be amazing as well but I guess that's harder in terms of travel logistics. There are tons of students there though so it's not really a problem. I definitely recommend signing up for an international mentor group as this is a great way to find out about parties.
Accommodation can be a problem. Most internationals live in halls, which are self-catered flats. These are really nice in my experience - much nicer than the ones I've seen in the UK! And it is "student accommodation" but it is still self-catered and fairly independent, and the flats have a lot of people in them.
In Lund people often switch accommodation each semester, so I lived in two corridors - and to be perfectly honest I much preferred the international corridor to the Swedish one, which was much less out-going and fun. Also, in the international corridors people a) usually don't already have friends, so are keen to socialise, and b) all speak English all the time, which is far easier! Other accommodation options involve living with Swedish families, which doesn't sound like it would be for you, or to get your own place. A mate of mine from the UK lived with a Swedish lady in his first semester and then got an AMAZING house with his friends in the second, which had a hot tub in the bathroom. The shower had two shower heads
... Anyway. It is tough to organise accommodation before going, which is why most internationals organise it through the International Housing Office - but it does rip you off in comparison to what Swedish students pay. It's still fine in comparison to the UK though. Some people I knew didn't get accommodation and had to start the year looking for somewhere to live! They all ended up all right though. I also knew people who lived in Malmo and preferred the lifestyle out there.
If you do go, let me know and I'll dig up the website where people list available accommodation - so people going abroad for a semester sub-let their flats or try to find roomies, for example. You could probably advertise for a flatmate and try to find somewhere together! And feel free to ask any more questions. It was really great studying in Sweden, and I think more people should take advantage of the opportunity not to pay tuition