Have used kangaroobit for quite a few years now and have found them fantastic. Moved XRP and various other coins in and out sucessfully, bought, exchanged and sold. Their interface is easy to use and once you get advanced verification you can now move money in and out using Faster Payments from the UK within minutes and at super low cost. I move coins out to my own wallets once I've finsihed any transactions to be on the safe side, as it's easy to move them back again when I need to. Recommended!