I use them only for voip numbers, have never used their email, credit card, vpn, etc services. For the voip numbers its been fine. Their android app is tolerable at best, I dont always get notifications for text messages, and theres no group messaging for SMS, which can cause hassles since I use one of their VOIP numbers for work. Id give it like a 6/10, I find it hard to recommend based on my experiences, although Im also not really putting in any effort to switch away from them
I found a few stores that dont allow redeeming fuel with that phone number. Makes me think they set the account up for people to use, or the poor person who actually has that phone number got upset after their fuel points kept getting stolen