I have a WATE with Frankenfinder as well as the CV alternates 12, 15, 21 with zoom finder and others.Any thoughts on the new CV 15-35 viewfinder? Looks like it might be slightly less imposing than the Leica... If anyone has had a chance to try it out I'd love to know how the 15 framelines compare to the 16 end of the WATE!
The CV finder is a little smaller, but it is larger front to back, has no bubble and you can't see outside the frame. It's nice and clear, shows average distortion levels and is nicely made. However, it's still over $500 and just doesn't work as well as the Frankenfinder. If you get the WATE, get the Frankenfinder unless you need a finder that goes up to 35mm.
And yes, the WATE works wonderfully on the M9 (and M8). It has a bit too much distortion at 16mm but is otherwise outstanding.
Henning