Mutant Future is not really a Retro-clone, near clone or anything like that. The closest game game it is like is Gamma World. Set in a post apocalyptic world, Gamma World has it roots in the dawn of the RPG age and D&D in particular. Filled with mutant animals, plants and humans of all sorts.
Gamma World was fun but it was not a game I played much. One of the reasons was it was close enough to D&D but far enough removed that my teenage self dismissed it as a lesser product. Stupid I know.
Mutant Future not only doesn't have that issue (it is the exact same rules as Labyrinth Lord) but I don't have the same issues. So Mutant Future then is a new game that feels like an old game that never really existed.
Mutant Future does have some differences from LL. The game is set in a post apocalyptic Earth like Gamma World. Characters can be an Android, synthetic, mutant animals, mutant plant, mutant human or the rare pure human (which is what I always played. I know...), also like Gamma World. Abilities can go as high as 21 and there are a different set of saving throws, but the basic rules are the same.
The book is easy to read with clear layout. The game itself is fun, fast paced and easy to learn.
I did have an issue with the monetary system (gold pieces??) but I would change it to barter anyway.
[5 of 5 Stars!]