Yes that is exactly right 😎
Well, that and it will also let you rip your carts yourself, so that you can make roms from your own collection if you want (but I personally haven't tried this feature)
Also you can easily roll back to default firmware if you decide you aren't interested in the jailbreak. But, it is strictly a superset of features. Installing the jailbreak firmware does not remove anything from the console, so generally it is always worth using.
Thanks for the response! I will definitely be trying this out. I just recieved my super NT... it is having trouble with about 80% of my old games... is that normal?
With reading cartridges? Or roms loaded in from the jailbreak firmware?
With old physical cartridges, generally it's been recommended that if you're having cartridge troubles, please use rubbing alcohol on your cart's pins to clean them. Sometimes the analogue products seem to be a bit sensitive in regards to how clean the cartridges need to be. This video I think is pretty good for more info https://youtu.be/4Ej2Y2chPGo