The price/value ratio is very good! The best part about this apartment is its location - it's close to everything. I would have to say it's pretty small for 4 people, but for 2 people this apartment would be perfect! There were 4 of us and it did feel a little "too crowded", however we came to Palermo not to sit indoors, so it was fine :) Both bed and sofa were very comfortable to sleep on. The boiler with hot water is pretty small, so if all 4 of you decide to have a morning shower, you need to be very careful with water consumption or the last two people might get surprised with a cold shower :D Other than that, there were no bad surprises - everything was smooth and good.
I have to say, the hosts do not speak English fluently, but they were very friendly and tried to help us with all our questions!
Having said all this, I do recommend staying here :)