Great location, room decorated to a high standard, comfortable bed. Really strong plug in the hallway that is incredibly off putting and can be smelled in the room, despite a closed door and both windows open. Not even olbas oil covered it up. For anyone sensitive to smells this is difficult and unpleasant. This means although I've given four stars, I couldn't stay again. Those with sensitive noses beware.To the owner: the smell is so strong, not even turning it off overnight and opening the windows addressed the issue.

A lovely, quaint Bed and Breakfast. Super clean and good location. The only reason I won't give the full 5 stars was because I found the beds quite uncomfortable.We had a triple room, but felt the room itself was quite small to have 3 beds in there. However, I would definitely stay again and I know my friends would.

We felt very welcome and enjoyed our stay. We stayed for the weekend as it was our anniversary and the room was lovely, really easy and smooth self check in which we liked. I'm Autistic so this really helped. The breakfast was nice and simple too. We were concerned about parking as its on street parking but we easily found a spot 20 yards or so away. Location was great, 20 minute walk into central Cardiff and a good pub just around the corner. We would stay here again for sure.

I had a lovely stay at Number 100, can't fault the place at all. I would happily recommend to anyone that's visiting Cardiff.

Pros: The rooms and breakfast (which you preorder) are excellent value for money. The facilities are also excellent. Very clean inside and plenty of fresh linen from the maid if you require. Lots of food and drink places within a few minutes walk. (The Four Elms is a great pub.) Cons: Our room (6) was on the top floor with no lift. It was small but nice. There is no good view from the dormer window. The parking was OK but I didn't like leaving my car there, as there was evidence that other cars had been broken into. I took off one star from location for this reason only.