The Curse CLient is free, and scans for updates for your addons every time you log in, quite easy actually........my UI is boring.....im a Rogue...... I use DBM and Recount.........not much there huh? otherwise when im just out and about doing my normal stuffs its Gatherer, NPC Scan and NPC Scan overlay..... im pretty simple, and like to play it as its given to me for the most part.........
But i DO have a confession........ I used the Icy-Veins Class Guid to tweak my Rogue and make her a better DPS-er, breaking my rule of playing it MY WAY lol... i was happy to see that for the most part, my talent tree was set up almost exactly the way you guys had it, with only a few small changes, it made me feel pro
And my rotation only needed tweaking to add one change. i was actually grinning ear to ear and saying YAY!!!! im not as big a looser as i thought!
now back to UI....... so yeah, recount. DBM. and i only use DBM occasionally because otherwise it slows down my framerate to 4fps.......not good.