I’ve used www.shapeshift.io a lot. No problems with them. I have screwed up and sent stuff over the
amount they would allow on a transaction…got a hold of a person in email…and refunded (and mildly scolded) on such.
Does have a lot of coins not supported, (like LISK which I find weird) but it works fast w/o issue.
It is what I use. I have not used it for about 1 year though…been concentrating all my mining to hoarding LTC.
(which is an interesting feeling watching BTC skyrocket and LTC go sideways!)
Can only hope our turn will come