Well this post will be short* as I have only completed one instance, which I did this week.

Instance: Deadmines
Characters: 5 x Draenei Shaman
Level: 21/22 (dinged shortly after starting)
Spec: All are elemental X/0/0
Gear: Quest and mob drops only

Comments: I'm still learning my way and Deadmines was a nice way to ease into instance running. There are mostly scattered non-elites with no large groups of elites- at level 21/22 there are almost no problems with aggro range so pulls were kept to 1-3 mobs most of the time. I did have two occasions where I pulled 4-5 elites along with 1-2 non-elites but managed to burn them all down without any deaths.

I wanted to wait for level 20 to get the healing stream totem, which is why I ended up entering at level 21 and dinging 22 shortly after. The healing stream totem was an enormous edge, +30 healing every 2 seconds meant that I spent very little time healing.

I one-shot every boss with the exception of Van Cleef. I wiped on him the first attempt, then killed him on the second attempt before dying to his last two adds. But I was able to zone in and clear to the corpse before it poofed, so I was happy enough with that. I still need to work on my macros and my responsiveness during fights, but overall I was pretty happy with the attempt.

*sorry, I lied, it wasn't short. >.<