Casita Paraiso is just as described. A small cozy place good enough for two people with a comfortable bed and a private space. Shared spaces in the main house (kitchen and bathroom) were always available and ready to be used, although you may find some clutter because people is actually living there, but that is totally understandable!!
It is a hut in a garden, therefore you could encounter some spiders wondering around the ceiling. Anita does her best to keep them controled but just be aware that some may appear. Keep in mind that you are in a natural space and you'll be fine.
The house is at a walking distance of all Bristol mayor attractions. If you prefer public transportation, Montpelier train station is just 5 minutes walking and there a bunch of bus lines quite close as well.
Anita is really welcomming and has a very interesting life. Chatting with her is a pleasure.
Long story short: amazing place to stay in Bristol if you can ignore a couple of spiders and some clutter in the kitchen.