I was pretty skeptical, but after 5 years of hearing that I needed invisalign from the same dentist, I finally decided to get it. Overall for any other issue she has been a great dentist and I do recommend the dentist' office. That said, I'm now about half-way through and I'm still not convinced it's not just a scam, but thankfully my insurance covers most of it.
I would 100% not recommend Invisalign based on my current experience though, it's been a real PITA. First they told me I can remove it for eating but then apparently that's not ideal in my situation, so I learned to eat with it. Which restricts what you can eat, and it gets pretty uncomfortable so eating out is a challenging. It has restricted my activities quite a bit and I need to plan around it (e.g, not comfortable going on a hike, can't grab a quick bite before the gym, etc..). And the improvement seems.. marginal at best. I've not completed it yet, but I'm not sure the inconvenience is worth it. (Before invisalign I did have a lingual wire which worked fine, it's cheap and a no-hassle kind of thing)