After several dealings with Jim and Paul at Sick Bike Parts over the last 6 months, I'd have to rate them as excellent in all respects.
I've bought a HD shift-kit with tools and spare parts, low-profile air filters, cylinder studs and a dual-pull brake lever.
All were exceptional quality at good prices, shipped quickly. Both Jim and Paul both go out of their way to help when possible, too.
The shift-kit and dual-pull brake lever, in particular, are worth their weight in gold.
I've done about 200km with the shift-kit now and couldn't imagine going back to a single-speed bike. I can putt along at walking pace in 1st, or cruise at 35mph in 6th with the engine just ticking over, like an overdrive. No more constant worrying about the LHS chain, tensioner and rag-joint sprocket mount. Love it.
The dual-pull brake lever works better than I thought it would, too. I was concerned about brake balance, (the lever automatically applies the same pressure to both brakes), but in practice it's not a worry and pulls up well, even during a gradual turn on gravel.
Keep up the good work, guys.