I love this little thing, Ive been using it for a while now, well at least keepin it in my pocket, I started using it with my M3 when I bought it, since I had no meter, and no desire for one, I had got the M3 to almost force myself to enter into "non mentered" shooting...and this has worked very well for me. Even a shot in my gallery on here that I used it for, inside low lit airport haha.
Cant hurt anyone to just print a few out, throw in your bag or pocket, I keep one in my car too.
Bryan