Do you by chance mean
Extra Holidays? If not, they don't seem to have any Internet presence. If so, the best thing I can say about them is that they have some listings, but those llistings are very sparse.
However, if you found a listing there that you like, go for it.
If you are considering listing your week there, by all means do it - as long as you don't have to pay more than $25-$35 as an upfront or listing fee.