I've been using my Leopold tenkeyless with MX browns for about a month now.
Initially I loved but after using it for a while i have a couple gripes I'd like to share.
First off I have to say I don't like the stabilizers compared to my Black Widow. I find they are to tough and a bit mushy. I'm not sure why they used the stabilizers they did, but I don't like em, I think a simple stabilizer would have been a lot better since I feel the Leo's ruin the original feel of the browns. This brings me to gripe number 2. I find the browns tactile feel very minimal, almost unnoticeable. To me its more like a light version of blacks (I've never tried red so I can't say). Also the switch is not at all smooth, This has nothing to do with tactility, what I mean is... well its hard to explain. I can only say that rather than smooth all the way down, it tends to stick a few times on the way down, this is only when I purposely do a slow press, and it is for every key. I should note the slower I try to press the key the stickier it seems. I'm not sure if this is to be expected, but I've never had this issue with a dome.
Anyway I thought I'd share my thoughts after using the leo for a while. All that said, I still love the board, for its rock solid feel, but after trying Blue, Black and Brown cherries, I can't help but feel they aren't the best quality switches, they're rock solid and have a decent feel, but the fit and finish just isn't there. I hope my ideas will be confirmed after my roommates torpe comes in.