Phi villa is a reclining chair with a lower end price tag.
These chairs are called zero gravity for a reason. They can be reclined so there is minimal weight on the spine. This is the way your body was designed to “sit” for extended periods. Not “up straight” in the formal position.
I have a chair in this style although not this one. This brand has a very good star rating. It’s reasonably priced. The problem I have with this type of chair is that if you fall asleep and you’re reclined you’re lower legs might get sore from sitting on the lower bar/foot thing. I’m relatively tall and this is a problem I have with mine. I’ve yet to decide how to attach something for my legs to rest on. If this is a problem for you it may be wise to consider a higher end recliner with a footrest.