HB has issues sometimes with completing quests or accepting quests, or when you put pull range on more then 5 yrds it tries to pull mobs which are behind walls, making itself look really bottish by not understanding that those mobs are not in line of sight and retry over and over...
But if you put it on 5 yards or less to eliminate this, then it will run through packs of mobs noticing them very late, and dies often if you don't have very strong gear equipped (like heirlooms).
On a side note, there's a few spots in kicks profiles for alliance (searing gorge for example, and EPL) where mobs are too strong for a non-heirloom equipped toon, in searing gorge there's a huge elemental elite and in EPL it tries to kill a mob with alot of adds running there... On several occasions my toon died like 10 times in a row...
So I'd have to be honest and agree with this guy. I've yet to find a questing profile that I can run (on alliance side at least) for like 8+ hours AFK, I've always had to interfere in some way. But I understand its not always due to the profile, it might be HB issues messing stuff up.
So far for horde side my toons do pretty good on the lowhangingfruit profiles with a pull range of 5 yards. But those do have heirlooms + enchants on them. Otherwise on that profile alot of it wouldnt be so good either.
