i have no practical experience with iptv so far, but i'm pretty sure i know what specific details i want (for now). using iptv with vlc (m3u):

• connections: multiroom (same network) or multi user (atleast 2, better 3). one thing here, if for example i get 2 accounts, and i use in two different room iptv, then for some reason forget about both and start on tablet (same network), i don't mind if it doesn't work with an error message or kicks out one of the other 2 active, but it's not acceptable if that's an big thing which could cost me the whole membership!
• payment: paysafecard would be best, but i rarely seen offers for that, so second would be paypal.
• channels: sports, mostly football (in the us "soccer") from europe (top leagues + cl + euro league). i think be1n, $ky etc. would be enough? not 100% sure though. i guess also depends from which country you get it. nhl and good stuff like hb0 nice to have.
• vod: currently not interested, i might use it if it comes with the package.
• quality: stable fhd 60 fps would be great, but 720p 50 - 60 fps will do i guess. not sure though. the better... the better.
• price: the cheaper the better, while i understand quality cost, i also seen enough warnings that a "higher" price doesn't guarantee quality or stability.
• (re)seller: if you are a reseller, pls state your source so i have better knowledge what i will get (and from where).
• support: nice to have some of those: reddit / skype / discord / on page chat / email. the more of those, the better.
• trial option would be nice, but first i'd like to have an understanding that i get what i want, not "tricked" into a service that doesn't fit my needs. best trial date would be next tuesday (or wednesday) for me.