And the downside is that bound weapons don't get bonuses from your weapon skills... The perks to raise actual damage don't work with them for some reason so the difference is nearly 5 times at 100 conjuration between my bound sword and my actual sword... The only bound weapon I find to actually be useful is bound bow and that's only because I don't feel like wasting my own arrows to raise archery...
i did not know that I haven't seen anything that makes that official but I have been wondering all the same if one hand perks work or not. I'm still majoring in mage skills all the same with the mage stone until I get say 100 in those areas. It still works to level conjuration and I could always go for a better one hand later if it doesnt work, but want to keep things more of a mage type character.