I've recently switched from Squirt to Silca Super Secret. I have to say the Silca makes my drivetrain run completely silent and super clean. It repels dirt amazingly well. I had pretty good results with Squirt too, but the Silca seems to penetrate the chain links much better and the chain runs cleaner. Squirt tends to get a bit sticky after a few applications. Overall I'm pretty sold on the wax based lubes.