If I'm not accelerating, I give a little squeeze of the clutch for a smooth easy shift. Less wear and tear IMO. No need to shift racer boy style if I'm just cruising.
I only use the quick shifter when I'm accelerating. And it seems more reliable the harder I ride. 1-2 needs a firm shift to get past N. If I'm already at cruising speed in 4th or 5th, I'll clutch, just a little really quick.\
The quick shifter is cool as heck though. I love the way the bike sounds when shifting. More rich exhaust popping between gears would be nice. Needs more fire and noise.