Pretty Good Overall
I've had only two bad experiences out of several dozen. One time a seller changed the price on something I ordered after I accidentally fell asleep, doubling the cost I believe solely because they saw how many units I had ordered and was waiting on before dozing off. He quite literally cancelled the order when it hadn't even been 24hrs (which isn't within policy) to try and push me into repurchasing at double the price which I didn't do lol. Another time I bought something from a different seller and was told to wait so I did but then literally 6 days went by of them being online but ignoring my messages asking when exactly I could get my item/reminding them that I was owed my purchase and that they were overlooking me at this point. Support from Itemku itself was excellent and reimbursed me in full but it was a frustrating experience and now even if that seller is the cheapest listed I won't use them.