I used the Wassel one on my Starfire and I think its brilliant. Robustly made, all incased in resin. Decent connectors.I think it's a quality item. Easy to fit, I've had it 6 years and haven't touched it since I fitted it, starts 1st or second kick hot or cold.
Good price too, I think they are about £80. You can view the fitting instructions online somewhere but it's no different to setting normal points really.