If your are serious about not having a roach problem then I suggest you order this product and watch em die, die, die!
it really VERY powerful stuff. the old tenants in my rental have left the place disgusting, with a really bad roach infestation in the back. I bought some of this stuff years ago and it solved the problem within a week, so i've just grabbed myself another 6 (you cant seem to get it anywhere these days). You do need more than you think as the tubes are small - but gets all of them and they didn't return. Definitely recommend!!
My moms house was infested, do you hear me, infested! Roaches were dropping dead so fast she couldn't keep up. Matter of fact her neighbor's apt. is roach free as well! Worth every penny!!!
I started to wonder if it would really work. Then after two weeks they were almost gone. I rate them as large, medium, and small German Roaches. I had used two tubes at first and after the two week period I used the next two tubes in places I thought they might be hiding. I still see a few medium but mostly small ones but they are about gone. The palmetto roaches that I would see on occasion since I live in Florida, have disappeared completely over the last three weeks.