I couldn't fault the guest house on it's service, location and the room, although I was disappointed with two things.
Firstly, the check in. As I was checking in late, the hosts had been really kind and contacted me, who then provided me the self-check in codes. Upon checking in, I can then use an electronic card to replace the codes when entering the guest house and my room.
The code provided didn't work. Luckily two guests came back at the same time when I was locked out outside and on the phone with the host, who kindly helped me and ensured I got to my room. I then went back out to get food. On return, the electronic card did not work. Called the host again, who then provided the electronic code for the entrance again. That's when we found that the code provided earlier was incorrect. There was a later message to my phone to say the code was incorrect though. So overall, I had a card which did not function properly.
When I finally got to bed, there was a constant noise coming from somewhere within the building. It was like a boiler or generator kind of motor engine sound. Even with my ear plugs on (which a guest shouldn't be wearing these to sleep), I was still able to hear it. It was still on when I left next morning. Needless to say, I didn't sleep well.
The lack of parking was mentioned on booking. The hosts allow guests to park on their designated parking space at a cost. Considering the parking fees elsewhere in city centre, it's only reasonable.