Which model is it, mate?
I recently had a go with an M18 FFP. Very nice it was too. Very clear.
Ret' was too fine for me at low mag', but I liked it a lot at 12X and over, which is where I'd likely be using it.
I could be tempted to buy an M18 myself, but in all honesty, if I was putting my money down today, I'm not sure if it'd be going on the FFP or SFP - as both have their advantages...
I have a silver T50 myself, as my FT scope - which is also a good piece of kit.