It's definately usable to get a microphone on front of an amp, but it's not the best.
the pole with the mic screw of my stand was a little loose, meaning that if you'd crew on the microphone, you could keep turning it. whatever was supposed to stop that just didn't do a good job. It was still sturdy enough to prevent the mic from moving on it's own though, so it's not that big of a deal.
The stand is pretty stable, if you can get it into the right position, you don't really have to worry about it anymore.
There isn't a whole lot of room for positioning though. It would have been nice if it was able to go lower, or if it had an extra pivet so you could get it into some other positions that are now unreachable.