I use it for less than a year, I bought it together with a P-rail for mounting on a Strat HSS (Trembucker So while size is important!).
This is extremely convenient, simple to use, the P-rail had to be designed in parallel with this system.
I've never tried this microphone with push-pull knob, I think it should work very well, but with the triple shot, the operation is very fast, without enmélage brush possible.
But there is a big but: when I received it, I thought the plastic was cheap, but it was aps very important, since in general we do not martirise this utensil. Except that if in fact: we still fiddling time to time interupteurs, not to be what ammuser, although it was soon a preference for a particular position. And within a year, I have already the dysfunction, the switch does not seem very solid. This is the bottom (ie side p90) that shit, I have problems when I go loose contact mode humbucker series (the position that I use the most), and sometimes you have to grind a bit for the his back. And that I not even imagine how it must feel alone when we have this problem on stage ... I'll disassemble it all the next time I change my strings to see if something has not readjust, but it's not very serious, it ets not the sort of accessory with which have must show negligence in construction. ..
I use them now for 1 1/2 years. Mounted on a Ibanez AR100 1980.
Very easy to install, the instructions are simple and clear.
Welds are almost alone.
In practice, it is also practical mini-switch or push-pull.
You get used to very quickly. The switches can be manipulated easily. The fact of having just above the microphones can quickly change sound.
Defects in, I found the cream a bit too bright (brighter than gibson for example) and plastic, even if it has not moved, I feel a little lighter. It's a shame not to find them in different colors and other materials.
In short, the principle is very good, making correct but the price a bit high.
But it is a good way to add sound to his guitar without touching the violin where the electronic cavity.