It was a great experience. I dare to say that this is one of the best deal (in terms of price to quality) that you can get around Valletta. It is air conditioned (which is a must in Malta), it is fully equipped (excluding microwave oven, but a regular oven looked new and worked perfectly) and it even has a washing machine (we didn't use it so I can't tell more about it). Jason was kind to left some food food in the fridge for us which came in handy, since most of the shops are closed on Sunday. The bathroom is clean and very nice with large shower. Since Jason was away when we arrived, we checked in via a safe box next to the door which was very convenient as we didn't have to call or wait for him in front of the door. I definitely recommend this to anyone.
Note about location: Located in Three Cities (Cospicua). It is a nice neighborhood and it is not too far from Valletta – either 10 mins by ferry or approx. 20 mins by bus. However, it is a bit far from any supermarket (there is a shop nearby, but it is usually closed in the morning and late afternoon). It is also on top of the hill, so keep in mind that you will probably need to scale the hill several times (there is a bus stop on top of the hill, but the bus there does not go very frequent).