No W.

Powerlevelling-wise I'm very disappointed with IGXE.
*Used to level a character on World of Warcraft
They did call me almost immediately after I placed my order, which I will give them props for. However the person that spoke to me was almost inaudiable and their English was limited. After it was confirmed, I asked on the Live Chat when the powerlevelling process would start, they said 7-8 hours. Nearly 15 hours later it finally started.
The time they quoted me to level my character from 60-70 was 3 days and 8 hours. After day one the character was 64, I was quite impressed. However on Day 2 they managed 66. Day 3 and 8 hours they're 67.
Now they have been playing for 24 hours straight, and it has been almost 4 days. They're still level 67. Not to mention the entire time grinding has been spent in only two places, well below my characters level. I had a look through some of their reviews, and most have been positive so I've been a bit confused. However I have found several people with a similar experience as mine, saying that their account has been suspended because the powerlevellers have been grinding gold in these lower level places then trying to sell it.
I've asked twice for my order to be cancelled, and both times I have gotten the same response. "Yes, but i can't decide this. Plz check back in 2 hrs for the powerleveller to be here". It's been more than 2 hours.
Hopefully I will have some luck in the next hour or so.

Sorry, long rant is long:)
Personally I would not advise using their powerlevelling service.