We have that one, and at first had lots of leaking problems with the fittings, but it turned out that it was really just the person who put it together. We had it hooked up as part of a trailer that we longer have access to, so when the trailer left, we bought some new hoses (color coded washing machine hoses) and a new LP regulator, and it fired up the first time no leaks whatsoever.
I will say that it's probably not the highest quality but for occasional competition use, it works great.
Lang 84 Deluxe
Yes, Dear BBQ on Facebook
Proudly sponsored by Dixie Meat Rub