I have purchased three of these machines (Burgmaster OB), but only one arrived in usable condition. UPS literally destroyed two of them. I insured the shipments, and after fighting with UPS for 3 months, they refused to pay, even though their own investigator stated that the items were handled improperly by their people. Lesson here....if you purchase one of these machines, ensure the sender packages it VERY WELL, and I would recommend having it sent via truck frieght. UPS literally broke the motor castings, the support castings, and bent the uprights that support the drill/motor. Those two are now nothing more than "parts" machines.
The one working OB that I have is a wonderful machine. It cuts approx 30-45 mins off anything I build because I can load up all the bits and reamers I need, and never have to worry about taking the time to change things.
The biggest drawback with the Burgmasters is that there is only ONE place you can acquire parts. The individual is in Long Beach, CA, and was a supervisor for Burgmaster when they were in business. The parts are also very pricey. That aside, the machine is very accurate, and very sturdy. Each of the positions on the turret offer different speeds, and the machine has a high and low range that is set by changing the position of the drive belt. The OB model's chucks will only handle up to 1/4" bits, so don't expect to be able to drill anything larger than that.
I really like the machine I have, and am always on the lookout for another. Stay away from the machinery dealers you see on Ebay and such. Those people have junk machines that their trying to unload for WAY too much money. It took me a while of searching, but all of my machines have come from individuals, and I made absolutely sure that the machines were in complete working order prior to purchasing them.
I say this becasue trying to work on the machines can be a real bear! Although I have done it, replacing bearings or gears in any of the six spindles requires some effort and special tools.