I used it a while ago, quite good, at least you can find people that you know are interested in exchanging links
It's good and as fryman said you can find people who are interested to exchange links but... ... their automated link exchange returns 0 PR to your site ... I always check manually from where the link back comes. When it's from their automated service I'll not put up an linkexchange with that site.
Sorry but have to disagree. I found I spent most too much time looking for non-existent links compared to the benefit derived from links from some obviously "made for linkage sites". These days I stick to good old fashioned quality sites complemented with co-op and link-vault for quantity.
I use linkmarket for a few months. It works very well but you must very carefully check each link exchange request. Some webmasters place your link to websites with PR 0 (even the homepage has good PR). Many link exchange request are from unrelated sites (but if you have paid membership you can select categories from which you don't accept link exchange requests).
Its only a tool to find potential link partners (and the best automated one at that). Like any link trade, you need to have a system in place (like www.clicksentry.com) in order to mantain it. In order to get the benefit, most sites have to pay the subscription rate so they can block out most of the SPAM. If recips are your thing, they are still the best for the money. Their tech support is the worst but it always has been so their are no surprises there. It isn't hosting though, so the quality of tech support doesn't really enter into the equation (Its just an annoyance)
We've used them for a few months, and while at first they were brilliant (we found lots of quality link partners), now our accounts are filled with 99% spam, and often the sites that would make decent link exchange partners are using sneaky tactics like blocking spiders from indexing the links pages, etc. Results will vary, but we're not happy with it