This would be a good stamp shop were it not for the owner. The three times I have been in, rather than chatting about stamps or leaving me to browse in peace, he felt the need to pontificate laboriously about whatever political topic had his dander up.
The selection is fairly good, but it can be hard to concentrate on what you're looking for with all of the jabbering.
The location is a little creepy, being in one of those patchy bad-ish but still OK in daylight parts of town and you have to be buzzed in. I know one's valuables need to be protected, but it does feel a little like a prison visit with all the bars.
Pros: Relatively good selection
Cons: Shopping is unpleasant