We've done 3 swaps so far, with one planned for this summer, and I'm now a total convert! Thought it might be helpful to give some details:
First swap was about 10 years ago to a suburb of Manchester and a decent but very standard 1970s house. We were living in a decent but very standard small 1950s house in Watford. Both families with small children. Was excellent to have a free holiday and go somewhere with everything we needed and explore a different area.
Second swap was last summer - to the Netherlands! Through Guardian House Swap website. Now we are in a bigger more attractive Victorian house but still in Watford. So not a particular tourist destination, but close to London, and actually easy to get to loads of other places. Couple in their 60s swapped with us, they worked from home for a bit, he visited UK based colleagues, they did a bit of tourist stuff. Their house was fantastic - Victorian -era in Leiden, very much lived in/full of books/quirky/kitchen honestly looked like original 1970s. Clean but not at all pristine. House also came with an English lodger on the 3rd floor (who we knew about in advance) who was a really interesting woman! Was a brilliant swap. When we had a problem with our car the Dutch swap guy was v v helpful (over WhatsAppand a phone call) with recommending an emergency mechanic, which neighbour could help with jump leads etc etc.
Third swap was later last summer to near Rutland water in the UK - they had a modern fairly large house in a decent but not particularly touristy village - again it was excellent to explore somewhere else and have free accommodation! I think they liked our house because of the easy access to London. The wife recommended People Like Us (PLU) house swap website - terrible name but good site.
Swap now arranged through PLU for this summer to Sweden. The house we are going to is smaller and probably less "nice" than our house, and in a decent looking but not particularly touristy town near Gothenburg. But the family sound genuine, the house looks fine, and it'll be a great way to see Sweden (which is pricey, so great to have free accommodation).
We have lots of other messages of swaps we don't want to /can't do; equally I've sent out lots of messages to people who often can't swap. But when it works it's brilliant! We already have a few people who we have said we can't swap with this year but maybe next. Including one in Mauritius!