I brought this dance mat a few years ago from a local shop, for about £70. It still works as well as it did when I brought it, so it seems durable for the most part. I did have some trouble with the connection falling out, but it was easy enough to open up and fix into place with super glue.
It's very responsive when using on the Dancing Stage PS2 games. However it isn't perfectly compatible with some PS2 > USB converters and may not be responsive when playing Stepmania on the PC. This might throw your timing off.
One problem I have with this is the metal parts on the top. If you put your foot in the wrong place without wearing shoes, it can hurt. It's heavy enough that it won't move though, so you can usually avoid this with some skill.
Overall it's a decent dance mat, but not the first choice. If this is the best available though, then it's okay. It might be difficult to get a better version shipped to the UK.