London system in general is a great opening; quick and easy development, and no huge theory to it.
However, I believe there is more better openings than the London like the English opening, Queen's gambit, Vienna game, or even the Scotch game.
No matter what type of player you are, always go for quick development and not waste a single move.
If white plays 1. d4, you could play the slav defense (1. d4 d5 2. c4 c6 3. Nc3 Nf6 and develop like you would in the London. There are some theory to the slav, but you could make it work like a Reverse London ONLY if your opponent plays 1. d4.
If white plays 1. e4, the closest thing to the london would be the Caro Kann, but it's slightly similar to the French but with the light square bishop developed.
I actually used the reverse London and won a few games as black, just wanted your reviews.