Yes, Leaf Filter starts at $40/foot, and we got ours down to $8/foot.
They do use drama tactics, but if you do your research and counter their $40 with $6, they quickly come down to $20, then $16, then $12, and then you just hold firm at $8-$10 and you'll get it. You simply have to be completely willing to let them leave without a purchase if they don't meet what you decide before hand is affordable for YOU. They will buckle, and if you're adequately prepared, their drama show can be entertaining.
Installation by cheap local labor, yes, that is true. Here, you just need to know what you got in your agreement/purchase (i.e. they haul away and clean up ALL junk removed from the existing gutters), and make sure that you do nto agree to only verbal items... get it all in writing, and review all of those details with the installer before they start the install.
Warranty... I've had one callout, and the guy who came was responsible, but not creative enough to figure out the solution to one of my problems, so I instructed him on the work, he did it, and everything is pretty much great now.
Super heavy rainfalls on a steep roof like ours, and there will be some gutter overshoot, but that is not a typical scenario where we live, and I can live with it.
After a number of super heavy rains and regular rains, I'm still happy, but have not yet navigated my first fall season with the Leaf Filters in place.