I got excited when I saw this pop-up in the newsletter thinking maybe it was back on the market, but when I looked online Brinkman still shows it as no longer available. It's basically the same smoker sold under the New Braunfel's and CharBroil names... I bought mine about 9 years ago at Home Depot.
I use it several times a year for ribs, pork roasts, pulled pork, turkeys and corn on the cob. I haven't modified mine yet, but plan to. There are good plans available on this forum for a baffle to keep smoke/heat from escaping between the tower and firebox (I haven't really had that issue) and for improving airflow to the firebox by raising the grate and adding a basket for the coals. The lid on the firebox could be improved and the firebox damper could be tighter but all in all, I've had wonderful results.
I can't speak for the NB, but the CharBroil model looks like the mirror image of the Brinkman, as mine has the firebox on the right. I don't know if Brinkman actually swapped sides of if the published image is just reversed. Initial setup, I had to go find a replacement rod for the rear axle as the one shipped was slightly too short to secure the wheels. I also found that over time, the mounting points for the front casters were apparently too lightweight and bent upward allowing the legs to settle on the top of the caster wheels preventing them from swiveling or rolling. I am currently looking for some new front casters and a way to mount them as sturdier replacements.
I don't know what I will do when mine eventually wears out as I really love the design more than any (non-prohibitively priced) replacement I've so far seen. I'd really like to see this brought back out, perhaps with double the guage of steel and a gasket on the door, firebox lid and firebox damper to seal it up tighter.
Fuel of choice is plain charcoal for a base and split hickory mini logs I get at Bass Pro Shops. This jewel has a permanent home in my garage and rolls out into the driveway for cooking.