VPN is a trust exercise, but, I’m sure if Mullvlad isn’t the best out there, they’re far from the worst.
They were incorporated as 1337 Services LLC in Nevis (the Caribbean island) and recently it suddenly changed to Njalla SRL in Costa Rica. Looks like some guy wrote a post about it where he contacted them, they said "internal restructuring, nothing to worry about" and refused to elaborate further.
I know Peter Sunde (of TPB fame) founded it but I don't know if it has changed hands now.
Rolling your own L2TP/IPSec gets flagged by the China firewall these days