I own the Producer version and it's great. Great included effects as well. Really all of their plugins are extremely high quality. Also it's very stable for me. It does have some differences in workflow which you may like or hate.
There is one, and only one, list of all active sounds and synths called the "Channel Rack". The Channel Rack can be filtered, but there is only one Channel Rack.
You use the channel rack to create "Patterns" of some length which can contain either Step Sequencer data or piano roll data, or both. There can be as many Patterns as you want.
First major difference from most DAW's: The "Patterns" are then placed into the "Playlist" in "Tracks" in whatever arbitrary order you feel like. The tracks play whatever is in them in a normal timeline fashion. But the tracks are not tied to anything, you can name them whatever you want and put in whatever you want.
Second major difference from most DAW's: The mixer is a totally different paradigm. You can assign only items in the "Channel Rack" to the mixer and it doesn't happen automatically. You have to tell it to route a certain "Channel Rack" to the mixer. Each mixer channel has an effects rack. There are some other special things regarding the mixer that I won't get into.
So, after using it for a while, I would say it's major strength is the creation and arrangement of patterns. You can do the same thing in any DAW, but trust me that it's way better in FL Studio because of the browser, included content, the Channel rack step sequencer, and some very deep functionality for handling audio and MIDI. That's why it's super popular for electronic music and hip hop which largely uses patterns and only a bit of vocal recording. You do have to adjust to this way of doing things, but just watch some Youtube videos and you'll be fine.
On the flip side, you will pull your hair out if you try to use it for multitrack recording. It can do it, but it's not optimized for it and there are DAWs which are way better for that.
If you're interested in getting it, PM me.