Been using this in the latter winter and its great - I had a tester bottle and lasted for ages (well I was a bit short on the lube).
I found that the plates became a bit rusty but after putting a bit of lube on ones fingers and coating the outside all was fine. £7.50/bottle and I reckon it will last for quite some time 
After washing and drying the chain there is no need for degreasing and just a quick fresh application and drying keeps it sweet. I also think I get less chain suck in wet rides over all but not sure if thats wishfull thinking 
