Gloxy 2x

[pete548]

Have recently been given a D3200 body and acquired a 55-300 Nicon AF-S lens, among others. My interest is in wildlife photgraphy, and have been looking at a Gloxy 2x multiplier, but, strangely, cannot find any reviews. Anyone have experince of this?
Would obviously like a prime telephoto, but way out of my budget atm