Welcome to our Mattress Forum! 
I agree with Jeff’s comments that other people’s comments or reviews no matter how well-meaning they are can do more harm than good if you did not define your own set of personal criteria to go by and deterimed what is important to you according to your own personal value equation … along with finding the specifics of the product (component specs and features) to evaluate and run it by this criteria. While you’re looking at a more specialized sleeping product I’d still suggest starting with the mattress shopping tutorial here. which includes all the basic information, steps, and guidelines that can help you make the best possible choice … and perhaps, more importantly, know how and why to avoid the worst ones. There is also more about the 3 most important parts of the “value” of a mattress purchase (also applies to sleep chairs) in post #13 here which can help you make more meaningful quality/value comparisons between products in terms of suitability (how well you will sleep), durability (how long you will sleep well), and the overall value of the product compared to your other finalists based on suitability, durability, and all the other parts of your personal value equation that are most important to you (including the price of course and the options you have available after a purchase if your choice doesn’t turn out as well as you hoped for).
Aside from the few pointers, I mentioned in Post #2 here maybe someone that owns or has some experience with a “sleep chair” sees your post and can offer some input for you.
Phoenix