Have used Kraken for a couple years. Have had an overall good experience until recently. My whole account was liquidated due to their equipment crash, which caused the price of many currencies to drop anywhere from 30 to 80 percent below other markets. The inability to log into my account and cancel orders or to even add money had me liquidated into a negative position. Says they have the most liquidity of other exchanges is further from the truth. Only way to contact customer service is through a reddit forum, which is a horrible way to due business. Has been almost two weeks without any assistance. Check the Reddit support page if want to know more.