If I had to rate these games separately, I would give 2 stars each to the first two games, and 5 stars to the 3rd one. For me the difference between the first two games and the third is so glaring that it felt like they belong to entirely different series, which, in a sense, they do, as the first two games are set in the 'fictional' world of Bram Stoker's novel, and Dracula 3 is set in 'real' world, where the novel features as a work of fiction based on 'real' events.
Dracula 1+2 get two stars because they look visually nice and have good creepy atmosphere. Gameplay-wise they were often frustrating because of counter-intuitive puzzles, but mainly because they were too dark, even with screen brightness at max; I literally couldn't see an object I was supposed to pick up at times, so I sometimes spent ages scanning the whole screen pixel by pixel to find a thing that I would use once and then discard, which was very immersion-breaking. Other times the puzzles did not make much sense, so I just randomly tried using every item in the inventory, until something worked. It did not help that the items had zero descriptions, and it was not always clear what certain items even were and sometimes I didn't even know why I was doing what I was doing.
I do however recommend Dracula 3 because I found it really enjoyable compared to the other games, with equally unsettling atmosphere and interesting, sometimes quite challenging and most importantly, logical puzzles. There is an objectives tracker, which is useful if you feel stuck or forgot something. I also liked that upon dying you did not lose progress since last save, because game auto-reloads the last scene. The narrative and characters were kind of bland though, so the game is best enjoyed as a series of puzzles rather than story-driven adventure game, as it is extremely linear. The only problem I had with this game was actually getting it to run on Windows 10 at first, but a little googling helped to fix that.