I've had the type keyboard since I bought my Surface Pro but it developed a problem so I've sent it back to MS for replacement. In the mean time, Best Buy had a touch keyboard 50% off as it was open box so I picked it up. I like how it feels folded back in tablet mode and if I'm purposefully typing on it (facing the tablet square on with my hands in proper position) I find I can type just fine.
The difference I've noticed is all the times I just want to reach over and type something real quick. I can't orient myself and find home row by feel like I can with the type. I have to look for it. Also, I'm never sure if I didn't press a key hard enough or if I missed the key (I know the clicks should help with that but I usually have the volume pretty low).
For me, when my type keyboard comes back, I'll probably use it much more often but the touch is still vastly better than the virtual onscreen keyboard.