Topres are buttery smooth and very nice. The reason I never really stuck with them is for two reasons:
-The don't have that "crisp," mechanical feel. The feel kinda soft and nebulous. And more importantly...
-They don't have the springiness of Cherrys. Cherrys sort of help lift your fingers back up reducing fatigue. Without this springiness, I feel like I have to lift my fingers after each keystroke, and I get tired after a while.
That said, you really won't find a better out-of-the-box keyboard than a Topre Realforce. They use top-notch materials and are built like tanks.