I played the original Dragon's Lair when I was young, and I didn't get very far in it then, but I remembered liking the overall look of the game and, of course, the fantas(y knight/dragon/damsel-in-distress) theme.
This is very like that original game (I only tried the first one), which is good, but I remembered why I never finished it as a child - it is frustrating. As a game, the mechanics of it are very simple, but not of the type that I generally choose to play.
I give it a 5 because I can see its worth as a game for those who are better than I am at patience.
You get the option of watching the game complete itself - I did so, remembered some of the scenes, then sent it back so someone else could appreciate it more than I could.