I have been running my stroker for about 5 years now, its got about 30K miles. I spent about $1200-1400 at the machine shop and he got me most of my parts as well. It runs good, gets the same bad mileage as the 4.0 and has a noticable increase in power.
Just a disclaimer it will not fry the tires from 60 and eat corvettes for lunch LOL. Some of the stroker stories on the web seem a little crazy.
If I weren't also doing a motor for my barracuda I would do a different stroker. One with 4.0 rods and more attention to detail. If I wasn't rushed I would say this one had another 30hp or so in it.