As others pointed out, this is retro-crpg done right. There are only very few flaws, like the weapons you can find and buy (barely the really good ones you are looking for so constant reloading and checking vendor inventory until you find s.th. good), but all in all this is a masterpiece and an absolute artwork!
First of all: every single one of these games has it's flaws, but if you like oldschool rpgs and especially if you like blobbers, you will propably love these. my personal favorite are 4&5 as i love pixel art graphics (and they are pretty artsy imho) and you can combine them to one game.