Interesting to see a thread with more real Tandoor users - I got one a while back, but it left a lot to be desired. Not only did I deal with shipping problems, but the unit never cooked properly despite numerous attempts to season it for Naan. The construction quality was only so-so at best.
I did manage to make a few decent batches of Chicken Tikka, but it definitely did not provide that much improved performance over my charcoal grill as far as flavor goes.
Words of advice - don't skimp on a unit or you may be sorry. I'm sure there are a number of good ones out there, but especially if it is being shipped far - there is a great risk for damage if shipped improperly and some units are not made for the long haul.
However, being a glutton for punishment, I will eventually buy the tandoor I should have purchased in the first place and I'm sure it will make amazing breads, since the major focus of the manufacturer is fixated on the clay itself, its heat retention properties, and ability to cook correctly. The designer has done much work on commercial tandoors, so it is a professional-grade consumer product.
Also worth noting, at least here in the states, it looks like many commercial units are gas fired, too. That said, I've been to a restaurant that used a real charcoal tandoor and the flavor of the chicken in dishes and the naan was incredible. Looking forward to seeing more comments from other tandoor owners!