ThunderSoft Blu-ray Ripper works -- Probably...
Blu-ray retail discs have LOTS of DRM. A movie might be split over several video files, with a play list that tells the player which files to play in what order. There are fake play lists, & fake video files -- get it wrong and a movie can skip scenes, play scenes out of order, or end 20-30 minutes in with a DRM notice. And that's on top of the regular DRM & new DRM schemes in the Java program code these discs use. SO the most anyone can say is that they used the app to rip whatever disc(s), & they worked OK after watching them all the way through. Anything more than that would just be a guess.
ThunderSoft Blu-ray Ripper has basically 2 modes -- it'll copy the video from a Blu-ray disc or folder [having the Blu-ray in a folder means you've already used something like Passkey to copy the disc without DRM], saving the file as MKV or mp4 vs. the original .m2ts, or it can re-encode the movie to another size &/or format &/or bit rate.
If you've already copied the Blu-ray to your hard drive, e.g. with Passkey, the old, free tsMuxeR might be a better bet for copying just the main title [movie], since it lets you skip audio & sub tracks you don't want, and also lets you extract the core 5.1 audio when the Blu-ray uses audio HD. That translates into a few GB shaved off the file size. MakeMKV is also a solid choice, though having the video file in MKV rather than Blu-ray native .m2ts can actually reduce the number of compatible video players [a side effect that ThunderSoft Blu-ray Ripper shares].
When it comes to re-encoding however, ThunderSoft Blu-ray Ripper would not be my first choice. There are better apps out there for that, including some of the many ffmpeg-based converters that have been on GOTD. Most of those won't handle Blu-ray DRM though, so you'd still need an app for that, possibly ThunderSoft Blu-ray Ripper in copy mode. DO bear in mind that re-encoding 1080p video to 1080p video at a lower bit rate [for a smaller file] is CPU intensive and can, depending on your CPU, take a Very long time, and can be prone to audio sync issues.
That all said, installing today's GOTD, ThunderSoft Blu-ray Ripper as backup may not be a bad idea if you do this sort of thing, because from time to time you might find that your main app, whether it's MakeMKV or Passkey or DVDFab or whatever, won't work with whatever disc. In that case you have something else to try.
The app itself installs to the program's folder, with folders added to My Documents & Users\ [UserName]\ AppData\ Roaming\, with one registry entry for uninstall, & a 2nd for the app itself.