Questions on the B757, is it worth getting?

I've been looking at getting a tubeliner for X-Plane, as I miss the NGX on FSX. I recently bought the Saab 340A, which is a fantastic plane, but can only be used for VOR-VOR flights, and is great for small hops.

I can't ask over at the org unfortunately since I'm blocked. Could somebody who owns the B757 let me know their experiences with it, and whether it's worth getting, specifically I'm looking at the following:

1) What's the documentation like? Does it come with decent tutorials and manuals, like the NGX does.

2) How hard is it to adjust the dials and knobs without using the mouse-wheel (In the Saab it's a nightmare). I only have a basic yoke, and do really want to invest in additional controllers or displays as I'm limited on space at home.

3) What does it do to your frame-rate?

Also any other feedback you could give would be much appreciated