imprecise and disappointingly poor

with sadness I look at my old beloved Logitech MX 610 mouse. Unfortunately, this version is no longer unbeatable to get.
which is now offered performance mx comes not even come close to the quality of the old!
the mausrat sits example too windy in the bearing - will be in SketchUp or other programs that mausrat hold for a function, it constantly loses the command, since the advice to tilted away.
barely rotates, it also runs as quickly and easily stored, that a meaningful scroll hardly possible ...
I have no buttons for volume, email ....
All in all, annoying. ought to have equal send back! Unfortunately, I'm still on the search for alternative!
for me anyway, is clear: Stay away from this mouse.
Sorry Logitech. set, six ...