I stayed here for 2 nights to visit relatives in my home town. I've never experienced anything quite like it!
It's very centrally located and the location was ideal for my purposes. Whilst it's not really cheap, it was the cheapest I could find in the town for the nights of my stay, so I booked on-line. They took the payment 24 hours before arrival and then sent details of the entry codes for the front door of the Guest House and my room by e-mail. (Naturally I didn't read this, so arrived and couldn't get in, so had to phone to get the codes I needed- but I agree that is my own fault)!
Having gained entry, I then found there are no staff on duty, so you effectively check yourself in and have to work out where your room is and then gain entry yourself- moving about so the sensors on the lights don't go off while you're opening the door. Once in, my room was clean, fairly spacious, basically equipped and had a comfortable bed. The whole experience was very clinical and soul-less.
My room overlooked the fairly busy street, so it doesn't get quiet until late and traffic starts about 6 a.m. I could cope in the winter with closed windows, but can't imagine what it's like in the summer.
The shower worked fine, but has no adjustment, so you have to wear the provided shower cap if you don't want wet hair every time you use it.
In the morning, you go down to the basement for breakfast and there I met the only member of staff I saw in the 2 days I was there- the chef/ waitress/ cleaner. There is an adequate range of cereals and a nicely cooked breakfast (but it doesn't include Powter's beautiful Newmarket Sausages- shame given that you're in Newmarket)!
As my elderly mother lives in the town in a home that has nowhere for me to stay, I shall be visiting Newmarket frequently and will need accommodation. However, I would only use Ashley House again if there was nothing else available in a comparable or cheaper price range. They'll have problems when the new Premier Inn opens next year!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC