Absolutely worth your time.
I tried to explain this to Veggie over chat... but I'll do it here again for your benefit, since you haven't somehow ended up on my ignore list yet.
First, it is known that I am a great advocate of games being played with a pad/controller. It is my preferred input method and I do not wish to try to figure out a comfortable way to sit in front of my 42" TV with a keyboard and mouse to play games.
Second, it is known that I love me some achievements. For me to spend time in a game where I cannot lose myself in achievement hunting is a rare, rare, rare occasion at this point in my gaming life. Go check my steam profile if you'd like the hard numbers (I'll save you the time; on Steam: 6,137 Achievements, 79 Perfect Games, 47% Avg. Game Completion Rate -- beyond Steam, I have 6623 trophies on PSN with 96 platinums. I have a gamerscore of 60,101 before I abandoned my x360 for all intents and purposes).
Now... take that into consideration when, late last year, not only did I play The Witcher from start to finish, but I also did so with a controller and without achievements. While I did not play all the EE extras, as I was "Witchered out" and knew I still had TW2 to play, I did spend a grand total of 38.1 hours.
Yes, the game starts out slow. Yes, the game is kind of janky. But like a lot of games, once you get the hang of the combat systems and figure out the way you like to play best, it's a great experience.
Again, you already own the game... how long have you played? How far did you get? If you tell me, I can better tell if the game should have become more enjoyable for you by then or not. But the recommendation I gave Veggie was "give it a few hours, play to this point, see if you enjoy it. If you're not really getting it after <spot> and you don't feel like playing, look up the story on YT or a wiki or something and move on to TW2".