My mechanic (owns his own shop, employs five mechanics) is going for a masters in photography. So he and I talk Canons and shooting every time I see him -- which isn't often, for automotive reasons. I'll just stop by to see what he's up to photographically. We'll go into his office, if he has time, and he'll show me what he's been up to.
His wife gave him an Intuos for Christmas. He felt guilty because he knew what it cost and didn't like it.
That was then.
I was in his shop three weeks ago. HE brought it up. "Remember the Wacom I said I didn't like? Well, now I think it's the single best piece of technology I've ever owned, outside my camera, of course. I don't even use the mouse -- for anything -- any more."
I was so glad to hear it, since I think the Wacom is invaluable.
Point? Yes, there is a learning curve. But if you simply force yourself to work with the tablet, it takes about a week -- max -- to get comfortable with it. Then you're off to the races.
I personally got to a point where I knew I couldn't do with a mouse something that I wanted to do. Usually it had to do with precision and control. And I'm GOOD with that mouse (like a lot of Photoshoppers). But once you realize you've hit a ceiling with a mouse, you know you need a tablet and you will get one.
And once you get past that little learning curve, you'll never look back.