Sjoerd--so far so good. The vinegar works super. It does need to be reapplied to some weeds. But it does work great. It is also a great bug killer. We always have a wasp and fly problem this time of year. So I fill a spray bottle and have at them. In a few minutes they are dead.
I'm glad you brought up using vinegar as a weed killer. I'm going to try it on quack grass and also lawn grass that creeps under the fence into my flower beds. I like that a lot better than poisons!
It works great. You will just need to reapply it a couple times through out the year. I also like using chemical free in my yard and garden.