I also can vouch for superiortraffic. I've used it on multiple occasions - probably 25-30 times - and have been pleased each time. The number of visitors I ordered were the number of visitors I received. I am certainly one of the satisfied customers - I'm glad JuniperPark suggested customers who had positive experiences post - a good idea to settle this issue rationally.
The traffic is just as good as any other PURCHASED traffic you're going to get anywhere else... I zipped 5,000 visitors to a loan site of mine the other day and received plenty of ad clicks - enough to cover the costs and then some.
Also, I've found Max to be the most accessible traffic site owner out there - I've often had my campaigns up and running within 10 minutes, just by sending him an instant message. You can't find that sort of friendliness and promptness many places.
In my opinion, two thumbs up.
As far as GT Web, in my very few discussions with him, he's been a reasonable and friendly guy, as is Max. I hope the two of you can work out this issue calmly and sensibly.
In the meantime, however, I once again give the thumbs up to superiortraffic as a provider of traffic.
-John