xapo because free send
Yeah its free
so far for low transaction and storing my spendable amount i used xapo, and used blockchain for high amount. I personally really like wallet where i can controll my private key, since xapo provide zero fees then im ok with that but only with the amount that i can tolerant.
According to
https://bitcoinfees.21.co/ The fastest and cheapest transaction fee is currently 70 satoshis/byte.
For the median transaction size of 226 bytes, this results in a fee of 15,820 satoshis (0.08$)
So your free wallet like Xapo is good only if:
1. Your primary source of BTC is faucets, you create a lot of dust transactions.
2. You are sending multiple low volume/dust transactions or sending overwhelming large number of transactions everyday.
In other cases I don't think that giving up your privacy is worth it.