I've done two batches prior, both on the damn stove, but today's batch was my first one using a propane burner. I got the Dark Star from NB about two weeks ago and have been itching to use it!
First, it took 5 gallons of water from 70 degrees to 165 degrees (for crystal malt steep) in 10 minutes. FWIW, I use an 8 gallon tri-clad stainless with notched lid.
The boil went very well. I finally got a good hot-break and a rolling boil and I KNOW this batch will be my first good one!
I will have to pay more attention to the air damper on the venturi inlet as I got some soot on the bottom of my pot. Easy fix there.
Sooooo, to answer the OP, I am glad I got a very good burner for less than 50 bucks including shipping. (bought some other stuff so the shipping cost was actually spread out a bit)
BTW, I used 1.4 lbs of propane. Other burners may have higher BTU's and some even with using less fuel, but that's fine. I likes mine nuf, yo.