I've been using irccloud for about 3 years, after 15 years in ircii, irssi and weechat inside screen and tmux. Aside from irccloud's mobile clients with push notifications, the biggest improvement over a terminal client has been multi line URL access. With weechat, I'd spend several minutes reconstructing a long URL in my browser, because my terminal wouldn't know what to do with weechat's sidebar. now I just click a URL and it opens. Stupid, but worth $5 a month to me.