Full disclosure here... I currently work at Netmark. But, prior to starting with them last November, I had been aware of them and sent them occasional referrals for about 4 years. Is Netmark the very best? We're a contender. Are there better companies out there? Possibly. Are we able to produce results our clients are satisfied with? Absolutely.

Here are a couple video testimonials. One with Chad Heath interviewing a client, the other is one that was sent in to us.
(I'm new here and couldn't post a link, so you'll need to replace DOT to make these work)
wwwDOTyoutubeDOTcom/watch?v=B1a3nwJlk0s
wwwDOTyoutubeDOTcom/watch?v=qZGtbvJ7F7w