After a two month backorder on Amazon, my CMStorm Quickfire Stealth with green cherries finally arrived. For reference, I used an IBM Model M for a long time, then spent the last couple of years on a Razer Blackwidow (blue cherries). I write articles and play MMO computer games.
Green cherry switches bring considerable resistance, and the keyboard bore that out. I haven't typed on switches this heavy since the Model M. While the buckling springs in the Model M felt like they had more "launch" to them (more resistance as you got closer to bottoming out), green cherries feel even all of the way through a keystroke.
The actuation points of the keys sit really high -- the highest I've ever used on a keyboard. Clicking at maybe 30% down, this keyboard seems bent on teaching me not to bottom out on my typing.
Overall, I like the feel of these switches better than the Model M. Green switches offer the same resistance but a smaller "click"/actuation. To put it another way, the lesser "rebound" of the green cherries feels a little more comfortable.
Honestly, I'd like to find a switch with resistance between blues and greens. Even after I break in this keyboard, I think it's going to remain a bit too strong for me.
The keyboard itself made a great first impression: very compact (tenkeyless) with a minimal border, quality non-slippery plastic, and I love the key caps printed on the side instead of the top. My one complaint comes from the LEDs for indicating Windows-key disable, caps lock, etc., which are unbelievably bright. I don't think the brake lights on my truck are that bright. Also, the spacebar seems a little more loose than the rest of the keys, but that may simply come from comparing it to the firmness of the other keys.
Special thanks to the many residents of Geekhack -- I've learned so much lurking here over the years!