Your question makes about much sense as asking are carrots nice?
There are so many different recipes for squash soup that it is impossible to answer.
Personally I think squash makes a silky smooth soup and works very well with Asian flavours and coconut milk. Why don't you pick up a ready made one in your supermarket to try and then make your own after that if you like it, adjusting to your own taste?
I'm only suggesting buying ready made as there are so many very different types of squash soup and for the sake of a pound it is money well spent experimenting with an Italian, Thai or whatever recipe to give an idea of the flavour and texture of squash before comitting to making a litre or more of soup that isn't to your taste.
I make it a lot, very simple. I add cumin, coriander and star anise for interest and it's always silky and delicious. Topped with some crispy bacon bits, can't beat it!