I will admit it has been a few years since I was shopping. And my internet research in my early shopping had me drooling over the Liberty. So much cool stuff. This was about 5 years ago. I got lucky one year and the shop I help out at invited me to tag along to DEMA. Got to walk the isle of rebreathers. I spent nearly 2 days looking over everything, talking to the reps. I was stepping into the idea of a rebreather with no path to follow, I didn't know anyone else with one (at that time). Blank slate as there could be.
After seeing the Liberty in person, I sucked in my drool and kept walking. I am pretty sure it is absolutely the most complex rebreather on the market. Overly complex. I had a few others that I liked, and after some more investigation a couple of the back burner choices were making there way to the front. Mostly in the name of simplicity. And a year after that DEMA I placed my order.
This is where things can really help you. Take a rebreather class. Learn what the failures can be and how to work around them. It is amazing how little you need to be functional on a rebreather and it will still get you back. The mountain of redundancy on the Liberty is a mountain of liability, there is twice the stuff that can go wrong. Knowing what I know now, after taking a couple of classes, I am glad I passed on the Liberty. And with all that redundancy, they are not fail proof. people have still died on them.
There are a lot of rebreathers on the market. Typically each one has a niche that they are best at. You never stated what your plans for a rebreather are. Are you planning on longer dive? Deeper? Travel? If so, where? Photography? My plan was simply to stay a little longer, and a little deeper. But the ability to travel was very high. Weight and size were high on my priority list. When you can put the rebreather in the overhead bin as your carry on, it does help with travel. If I were to play in caves, there are other choices that would be better.
You asked for my thought, there you go. And soon there will be someone else's thought added to this.