I owned a Drug, and if you can find one that works, they're pretty nice cameras.      One thing to keep an eye out for is whether the advance mechanism--  the trigger wind-- is in good repair.   The teeth on the cogs can get worn down and the chain can slip, which leads to overlapping frames.    Mine had this problem, so I sent it to Fedka.  While they were unable to repair it, they suggested I locate a second Drug with a reliable advance mechanism and they would be able to replace my worn out advance with the donor camera's.   
The cool advance, roller cam, and VF/RF are great, and it's very simple to adjust the RF alignment if needed...which was pretty regularly.   Ultimately, I decided that the cost of repairs (another body plus repair fees) wasn't worth it, and eBayed it.