There have been many issues within my 2 hours of discovering this service, despite it being free, it doesn't work.
First off, when making a server, the static IP redirect that you give to your users doesn't map to the dynamic IP that the server is on, which usually ends up with having to give out the new dynamic IP, to all users, every time you take down the server and restart it. Secondly, upon trying many of the FTB modpack installations, they do not give a version number, and they aren't the recommend or latest versions. I tried Monster Recommended & Versions 1.1.2-1.0.10, I tried DireWolf20 Recommended and Version 1.0.24, to which then I gave up because it is impossible to even get into a server. After downloading 1.5 GBs of data, and waiting almost 2 hours, I still couldn't get it working.
Either, allow people to upload their own mods and server files and just add a UI Element for the jar name, or at least update your modpacks to even work. Also allow people to set custom properties(such as modded world gens options[ATG, Biomes o' Plenty]).
