I've used them for years as well and it seems like they have really gone down hill the last year or so. The iOS app is now unusable for me. Lot's of slow or unresponsive servers now. Just heaps of issues for me.
They were recently partially or wholly purchased. There was a big stink about it because the other company had ties to Israeli intelligence or something. I may be misremembering the details, but I'm to lazy to look it up on my phone. I recently switched from PIA to mullvad and I can definitely recommend it. It feels more transparent to me, and the client app is well done.