I bought a V tower last year while it was 25% off, so it was pretty inexpensive. I got it to replace my old Herbalaire. To cut a long short I wasn't very impressed with the v tower, I thought the hits were wispy and I didn't like having to prime it to get the vapour going. So I put it in a box and shoved it under the bed.
Later I read about the DDave short adapter. So I got a similar adapter from a shop here in Australia just to see if it would make any difference to thr v tower's performance. It did. With a light elbow pack I can get solid hits with very little need to prime it, it hits almost straight away. I've also mixed reclaim into the herb and that worked well with the elbow pack as well.
I do plan to get some real DDave mods. The short adapter I am using is quite wide in the middle, it fits down the hole in the top, but only just. There's very little room for airflow around it. And as a consequence the unit can get quite hot, way hotter than it did with the original, narrower cyclone bowl. Dave's short adapter looks narrower than mine, and possibly a little shorter as well, so it would be better.
As it is I am currently using the v tower more than my Mighty. I've gone from disliking the v tower to liking it a lot. Basically it's all thanks to the short adapter, which was Ddaves idea (I think - at least that's where I got it from anyway). Which is probably another good reason to buy one off him..
cheers