I am the phpList community manager. Anyone used phpList before? We're Open Source (AGPL specifically).
We offer phpList as a hosted service on phpList.com. It's the same code (AGPL) but we deal with deliverability, updates etc. Our clients range from 300 mails a month (free) to high volume senders on VPS with millions of subscribers and mails :)
Yes I did, as self-hosted and for very low volume. Thank you for being part of this project.
However, I stopped using it because of user-experience issues. Interface was not clear and efficient enough, especially when working with templates. Last point, design seemed a bit outdated.
There are UI design changes afoot, I believe. The big changes for self-hosted users recently are the new manual at www.phplist.org/manual and the new forums, discuss.phplist.org (using discourse, which I adore!)
I think for small volume it's always better value to use the .com service. Using self-hosted is a lot of work for small volumes. I always used .com for my small business (years before I worked for phpList too) :)