I had to do some minor work with PEX, and thought it was pretty easy to use. It's nice that it is much more flexible than standard hard piping.
I used the "shark" fittings that actually don't require the standard PEX crimping tool, so I don't have any experience with that. I have a buddy that did some work with PEX and has mentioned the newer type of tool that has a small LED that will light up when the correct pressure had been applied. Might be worth looking into.
Descriptions of a young DIYer that wants to learn how to do everything himself. This is the kind of thing you don't see on HGTV.