Water-powered drain openers - as effective than chemicals?

[sunfish]

I have a recurring problem with a bathtub drain that gets backed up, thanks to my ditzy neighbor who insists on dumping all her kitchen scraps etc. down the drain. (Her kitchen pipes and my bathroom pipes share a connection somewhere in the wall. Yes she has been spoken to about this by the building's management, many times before. She still does it.) The problem is compounded by the fact that my tub has an acrylic lining over the existing tub, and I'm concerned about damaging the lining if I accidentally splash Drano or whatever on it. I've been using a plunger up until now, but it's not terrible effective, not to mention that sometimes I get even more junk in my tub before I'm through. And it's a PITA to try to arrange for a plumber through building management every time I start having problems again.

I came across this water-powered drain cleaner while casting about for alternatives to chemicals. It sounds good, but no one I know has any experience with these things. So:

- Do they actually work as well as claimed?
- Do I need to be concerned about causing more damage down the line by forcing the clog through the existing pipes? Any potential for inducing leaks?

FWIW the building was constructed in the late 1950s.