I mounted a Fullfield E1 last year.
I was looking for a "half decent" hunting scope in the 300-400 dollar range. I already shoot a (recent) Redfield on another rifle, am very happy with it, but decided to shop the brands before buying another one, which was my intention.
I compared the Bushnell (Elite), Nikon (Prostaff 5), Leupold (VX-1 and Rifleman) and the Fullfield E1.
The clarity on the Burris was miles ahead of the others listed. That combined with the no question lifetime warranty, even if you drop it and break it yourself, tipped the scales.
I would buy another without hesitation and would opt for Fullfield E1 over the Fullfield II or the Droptine line if you have the budget for it. In many cases it gets kinda tough for guys like me to see the difference between a $300 scope, a 600 buck one and a 1000 dollar scope. At least I don't see enough of a difference to chuck double or triple the price. But in this case there was a significant improvement in the clarity between those going in the 150-200 range, making it seem worth it "for me" to drop the extra hundred bucks.