I got this KJV study bible from Thomas Nelson back in late 2016, and I did so mainly because I saw it in a bookstore and liked how packed-full the pages were with notes, diagrams, charts and definitions of terms. There’s also a good deal of verse cross-references in the inner margin area, but I never really looked at that. I mainly just looked at word definitions and verse analysis text at the bottom of each page.
The hardcover edition which I got is far cheaper than the softcover/leather kind, and holds up well in terms of book spine condition even after months of use.
A study bible is a great way for a new Christian to have an all-in-one, quick-and-easy reference to terms, insights and topic descriptions that otherwise might be found only by referencing many books simultaneously (albeit in a more condensed form). Additionally, the authorship descriptions at the start of each book are very detailed and helpful too.
Unfortunately, after reading the entire New Testament using this (and doing so very slowly and methodically by using the definitions and explanatory text on each page), I found a few major issues with the study bible. For one thing, not all verses are covered at the bottom, and dozens of times I wanted to understand the wording/meaning more and there was nothing to look at. I could also say the same about word definitions, which many times are just absent.
The biggest issue for me is the questionable analysis text presented. Later in Revelation I believe the study notes say how such-in-such verse means that we should compensate preachers, and other verses talk about tithing — when none of these verses actually say that at all. This feels like a modern church commentary slapped on the KJV.