I've had mine as soon as they came out. I think it is better balanced then the light as crap 6" coil, but I haven't noticed any depth improvement, only a coverage improvement. I was a little surprised and dissapointed that it wasn't deeper than the 6" round coil, but after taking it out enough times, I sure didn't notice it going deeper. I would almost dare-say that it isn't as deep as the 6" but I haven't put them side by side. It is a good coil if you are getting into trash or tight areas, but want more coverage if the areas are a mix of tight and wide-open spots.
I actually sold my 6" coil and it was toss up for me. If they were around the same price, I would have sold the Coil Tech.
If it was closer to the 6" round coil price or cheaper I would get one, but I don't think $369 or even $330 is worth it especially when you can occasionally find a 6" round coil under $225 or less.