Yeah.... I'm on my 8th or so. When they work, they work great (about 80% of the time). Good option for the anticoagulated patient who needs post op pain control. At my institution we use them for mastectomies, thoracotomies, whipples... etc.
We actually do a modified technique that was published by our regional guy. We actually enter the neurovascular bundle underneath the rib at a relatively peripheral location usually 10 cm or so from the paravertebral gutters. Tunnel the catheter in the sheath and leave them in for a couple of days. We use mepivicaine-tetracaine-clonidine with epinephrine- about 20-25 mls per side. Then post up run .2 % ropivicaine with epi starting at 8 ml/hour.
They are pretty easy to place... but the major complication is a pneumo. So we make sure to hit the rib and walk off of it. Sounds like something that could be incorporated in private practice, but as mentioned above... I don't think it's too popular.