Got in some action on table with solo Napoleonic game.
I started of using General D'Armee rules but found those difficult to use in solo mode so after some deliberation I decided to use Black Powder (a 'Marmite' set like Piquet) with add-ons from the excellent Clash Of Eagles supplement.
BP works pretty well for solo play as each side completes its turn in its entirety before other acts with only minimal interaction such as Closing Fire (if charged) and fighting in Melee.
Not a big fan of the 'buckets of dice' melee system but to be fair it does make things exciting to a degree.
I used 2/3rds of written ranges so Infantry shoot out to 12" and Field Artillery to 24", I think I would reduce the maximum Musketry range to maybe 6" as 12" just looks too long on table with 15mm troops.
Most certainly a fast playing game with BP (at its core it is a very simple game) and the Clash Of Eagles supplemental rules go a long way to generating decent period flavour, if one can remember them all in heat of battle !
I would personally place it well behind Piquet/FOB, Shako and GDA/GDB in pecking order but it does appeal for large multi-player games as very free and easy gameplay
Couple of pics from session with Gen D'Armee, note Hesitant Marker on Brigade at stream and Brigade Skirmish Screens deployed (a system I stole for FOB).
And from the Black Powder sessions:
French push forward on left