I agree. This
is a fun set, good enough to be absorbing to play solitaire.
Here's a game I played solitaire (or played against a bot, since I don't know how to play solitaire on Goko). I end up ending the game with a six Province megaturn on turn 14. I end up using eight of the ten kingdom cards--pretty neat. The cards I skip are Treasury, which is contraindicated by Minion, and Explorer, which likes money decks and early Province buys (not megaturns). Of course against a bot I have to worry a lot less that my opponent will end the game with a megaturn (perhaps on piles).
The engine is strong enough that I could discard or top-deck cards (for Horse Traders and Count) and draw it back the same turn--or draw my Altar purchases the same turn I gain them.
Here's what I'm holding at the end of the game. I tried to do this without Count, and found it impossible. I think that I might have done better by buying a second Altar, and that I should have bought some Bands of Misfits early. Before piles run out the Bands can function as either Menageries or Villages, which is nice flexibility. Plus they count as a distinct card from either for Menagerie purposes.
1 Altar
4 Band of Misfits
1 Count
7 Fortress
1 Horse Traders
4 Menagerie
8 Merchant Guild
6 Minion
1 Necropolis
1 Estate
2 Duchy
6 Province
42 cards in deck
43 victory points