I like it a lot, although others would hate it, I'm sure. I had to poke a few things to get what I wanted (Like, I had to add an action command, aka "/me", and a quote command, so I can say ":q NAMES #cemetech" to get the people in the room, and to do other, more complicated things). My favorite part of the client, really, is that I understand it, and it's super easy to store logs from. The last few lines from the screenshot, when sent to a file, show up exactly as they do there. And, since the logs are easy to read, there also really easy to parse with sed or some other regular expression matcher, so I can find what others have said a lot easier.
Also, FWIW, and I doubt anyone'll want it, I had to change a bunch of things to get mlvwm to work, so if anyone wants it, I can share what I've got. The documentation is long-gone, so I had to guess for a lot of it. (It'd also be nice to have other people using it so we can get a lot more of the bars at the top made, for things like File, Edit, etc for each window).
Edit: Also, with sic, the commands are odd. To join a channel, you use ":j #channel". The first channel you join, you are talking in, but if you join another (":j #another"), then you are still talking in #channel. To talk in the other one, you do ":s #another", and now you're talking in that one. So, when you are wanting to switch what channel you are talking in, you have to use ":s #blah" each time you switch. So, what tends to happen to me, is that I'll be talking in one, leave for a while, and then say something and it ends up being in the wrong channel, since there's no visual cue, or I'll accidentally forget that I had put a space before I left, and so it doesn't register as a command and I actually say " :s #another". This client has gotten me really fast at typing "#cemetech" (for the normal and staff channels), so that's an upside
Like I said, I like it, but others will probably hate it