I'll be the dissenter here... I have a B&M shifter and LOVE IT. However, it is VERY notchy when the car is cold. Annoyingly so. If you only drive the car 2 miles at a time, you'll hate it.
BUT...
Once the car warms up, the shifter loosens up considerably, and the shifts are very smooth yet very positive. No more notchiness.
Your mileage may vary. I've installed six different shifters in four of my cars over the past 15 years, so I had some idea of what I was looking for, and what to expect.