I stayed for a month at Jessy's place so I hope my review will provide other guests with a good idea of the pros and cons of Jessy's place before booking your stay.
First of all, the location of the property is great. The public transport access is good - there is a bus stop downstairs with frequent buses going to the city centre. It is also close to the Llucmajor metro station (about 5 min walk) and there are many cafes, eateries and supermarkets nearby. The host, Jessy, was warm and lovely and she genuinely cared about the guests and gave me good tips about travelling in Barcelona. The communication was very good and Jessy was very responsive to my queries.
Now, there are some downsides that any potential guests should be aware of. Jessy has 4 lovely dogs and while they are well-behaved most of the time, they do bark excessively sometimes at every footstep or noise outside the flat or every time when you leave your room. The dogs' barking can be unbearable and it's beyond the control of Jessy. While Jessy cleaned the flat frequently, with 4 dogs, it's unavoidable that there will be dog hair throughout the flat. You should also be aware that the bathroom is also extremely small, even for a thin Asian guy like me, I felt cramped. There was no bathroom floor mat so there was nowhere to dry your feet after shower. The lighting in the kitchen was not working and remained unfixed.
The flat was very reasonably priced but you should consider if you can tolerate the downsides before booking. Overall, I think it's ok for a few days' stay but I personally don't recommend it for longer stay. Ultimately, it's up to you to weigh the pros and cons before booking. I hope my review above helps you with your decision.