I have been with idrive since 2009. At the time they were the only ones that allowed backups of network attached storage on their cheaper personal plans. Everyone else saw that as an "enterprise" feature which required a business plan. Which was bullsh*t, because lots of home NAS devices were being sold.
Anyway, I haven't done a recent comparison of services, but I remain happy with idrive.
Thesedays I no longer backup on a computer with a mapped drive, but directly from my NAS which runs the idrive software.
I had a catastrophic dual drive failure a few years ago, one failed and another failed during the raid rebuild! I was able to restore about 1tb of data and didn't lose anything important.
They also offer backup and restore by shipping a drive to you if you want to avoid the huge initial backup or a total restore, but I haven't used that feature.
They do also have a mobile app, but last time I tried it, it wasn't great.