I have shoulders a bit wider than average and long hands. Tried butterfly bars BBB multibar, but they didn't work for me. They are 58cm wide, but the outer curves steal a lot of space from the horizontal parts, so you end up with rather narrow bars. My wrists didn't like them at all. Like Magnus said leverage is not that great with these bars. If you will find them wide enough then they might be a not a bad choice. An improvement to plain MTB straight bars.

I find an albatross bar or wide MTB bars that sweep backwards way more comfortable for wrists. Nitto Northroad will accept MTB levers and has sweeps long enough to adjust your riding position a bit. They are definitely wide enough for myself. Beside, they look gorgeous.