Had a nice month here at Gabriella's studio apartment in May/June. There are 2 local train stations by the house or you can walk to/from which is good for exercise and I did the latter most often. You get an amazing view and overlook of Montreux!
If it's not evident, it's a bit upwards on a mountain. I would not recommend walking to it when first arriving to check-in and to take the train to Châtelard VD instead. Otherwise you'll suffer the seemingly never-ending hike with your luggage.
As someone else mentioned, it's very quiet with the exception of the highway traffic when the windows are open. In summer it can get quite hot and you need the windows open during the night so if you're a light sleeper, well you judge for yourself.
On that note, windows in Switzerland, and other countries, don't have nets - to prevent bugs from coming indoors - so you may have to deal with them. Gabriella's estate has a vibrant garden so there are some insects around. I recommend using only the windows by the bed because of this.
It's also worth mentioning the listing post for this stated there would be WiFi but there actually wasn't. Gabriella kindly offered to reimburse me for a local SIM card which was nice.
The kitchen is decently sufficient. I was able to make my meals, albeit a little slower than what it should take.
The bathroom is lovely. I love the ceiling window. I think it opens but I'm too short to reach it; I'm 5'7 (170cm). I wouldn't recommend opening it unless you don't mind cleaning up after pollen or other tree droppings.
I had a few stints with ants but apparently it's normal and I believe that because it's an old house and surrounded by nature, but it's worth knowing in case it happens to you too.
There is a small portable washing device included which can be handy. I used it a couple of times. It might be good for long-term stays or for your budget. It's worth noting it is small and handles a very small load. It's quite manual too in that you have to manage the wash and spin cycles yourself. And I've come to learn that clothes have a lot of lint so you'll want a lint roller too. But it gets the job done! And is much cheaper than the nearest laundromat, which is down the mountain by the lake level.
The bed and mattress is comfortable but a little unstable; not when you're sleeping but if you sit on the edge it can move so just be wary of that.
There's ample parking space for those with cars too! I wasn't fortunate enough though.
As for groceries, the closest store isn't close enough in my opinion. I didn't really think much of it until I fell sick with the flu for a couple days but luckily I did a run the day before and had enough to get by.
All in all I think this studio apartment is a great budget option for those wanting a secluded and quiet stay in Montreux and would recommend it!