Extremely good product as long as you don't expect everything to be perfect. Just like the original trilogy, you can expect the occasional bugs and quirkiness that will originally be ironed out throughout time with patches and mods. However, the original heart and soul of the product is still intact.
It's best played on the hardest difficulty, the environments are stunning, the challeng is definitely there, the exploration is phenomenal, the graphics are superb, I don't really have any complaints. Don't expect any award winning writing first story but it's definitely serviceable.
There are definitely going to be people that don't like it even fans of the original trilogy, but in all honesty much of that is nostalgia. This is coming from someone that has recently replayed Legends of the Zone Trilogy, so everything is fresh in my mind. If you take off those ancient glasses and look forward, this game easily replaces the original trilogy.