A great little apartment in an amazing and secluded location. There are some minor drawbacks - see below - but, even after all of those, this is probably the best airbnb-type place I've ever stayed in. Highly recommended!
Important things to note:
--- There is a road to the top of the hill. (From a mini-roundabout on Regents Rd.) The gates are almost always open, and if you're carrying a lot (eg. luggage), it's very worthwhile to get a taxi to pick you up or drop you off from the top. (Don't carry your luggage to the top like we did!)
--- You can turn up the heating very easily: set the thermostat (just inside the door) to manual and increase the target temperature (eg. to 21C); then go round to each radiator and turn all the dials to maximum. Make sure to put it all back the way you found it before you leave.
Minor drawbacks:
--- It's on a fairly-steep hill (about 40 steps and then some long steep ramps). If you don't want to get a taxi to the top all the time then you're going to get a lot of exercise!
--- Tourists wander around right outside the windows. (Especially outside the living room.) The more impolite ones try to look in. But you can close the shutters if you want a bit more privacy.
--- Getting food delivered is extremely hit-and-miss. It seems couriers (eg. from uber eats, deliveroo) are easily confused by the unusual location (or they don't want to cycle up the hill) - and this can lead to missed deliveries, hunger and regret. I suggest you either make your own meals, or bring in your own take-out, or go out to a restaurant.
--- Mobile/cellphone signal strength is very variable and can disappear completely sometimes in some rooms, despite being on top of a hill. (Maybe because the walls are thick stone?)
--- There's no heating in the bathroom (other than a towel rail). And it's a stone floor. You have been warned.