From my experiences with this profile (87-90 on my balance druid, about 415 ilvl):
This profile runs very reliably, and if you are a miner/herbalist, you will make TONS of gold by leveling from 87 to 90 here. Often times I would run it overnight and find that my banker had multiple inventories of herbs and ore to sell. My experience was greatly dependent on how many people were here, but it's usually 2.2-2.5m with 1-2 others in the cave, and ~2.8m alone (unrested, of course).
There were a few tiny issues, though.
First, it would sometimes get stuck on a wall at the bottom of the cave, run into the wall for 5 seconds, back up, jump a few times, run sideways and fix itself. It's not a big issue, but it makes it look kind of bot-like.
Second, when going to repair, it runs right through a sha of anger spawn, which can (rarely) cause it to get spawn camped by sha, and or his elite adds. I'd suggest running through the center of the zone, and avoiding that area by one-keg.
Other than those 2 problems, it's generally a very solid profile and I would sincerely recommend it to any one leveling an alt with herb/mining/skinning.