We stayed at the Casita for just under two weeks and it was very enjoyable. The view is even better in real life than in the pictures - stunning. The location is great. It's about a 10-min walk into the middle of Soller so you're close enough that walking out to dinner is not a big deal, but far enough away that it's very peaceful and quiet, and you get that view. The hill up to the Casita is a steep one, and about 350 steps according to my Fitbit. Chances are might be going to this part of the world on a walking holiday though, in which case you'll take it in your stride, but if for example you have mobility issues you should take this into account. Marcus couldn't have been a better host - very responsive.
We'd love to come back one day. If so, we'd likely try to come a bit more in-season than March so we could make more use of the outdoor space and the little pool.