The beta manager looks much like the regular FMS data manager, but installs only in MSFS vs the regular one that supports different sims and tools. The Navigraph data gets installed into your community folder like any mod. If you want to get rid of it, you can uninstall from the beta manager, or delete the folder in Community.
And if you already have a subscription, it costs you nothing more. You have nothing to lose by trying it out.
I was hesitant to use it initially as well. I didn’t trust the stability of the sim. Initially, I refused to use and 3rd party mods at all. I was getting enough CTDs without adding more moving parts to the mix.
But I eventually caved. I was tried of trying to get public charts through Skyvector or NavCan and finding out so many instrument approaches were missing, frequencies were wrong, and just bad data at times. If you followed the RNAV 25 at my local airport, it would land you about 1 mile past the end of the runway into Lake Ontario.
I haven’t looked back since taking the plunge. I’ve had no bad experiences with Navigraph. If there were errors in the charts or data (I’m sure there are), it was minor enough for me to not notice it or I just haven’t come across it yet .
Now my in sim data matches real world data, which match my charts, and external tools like LNM. I’m happy.