I'm a 'two products' man myself. I have treated both my FZ1 and the Ten to very liberal lashings of the FS365, including a squirt on the brake calipers. (If you put a bit in an old spray can lid and leave it for a week or two, the water evaporates and leaves a gel, which when brushed onto calipers with an old toothbrush gets them up like new.) You need to ride carefully to burn it off the discs as mentioned previously.... and if you ride immediately after applying - watch the tyres too. I am also using the ACF50 to coat more 'sensitive' parts of both bikes (I did use a whole can on the Ten when I first got it!) such as the electrical connectors, some of the bare metal brackets and around the shock etc.... Both bikes clean up very well, neither having significant corrosion (the FZ1 has 11k over 2 winters and the Ten 4k over just the one), but I always reapply after each wash. The FS365 can be used to apply a nice shine to bodywork too. Together they form a good barrier to the worst of the road grime and salts. Unfortunately if you want to look after your bike its a necessary evil that has to be done once a month. I personally feel that bikes now tend to have very good finishes (still not quite a long lasting as cars maybe) which can withstand a fair bit of punishment.
If you're buying a second hand bike it is something to look for, it either means a well cared for bike........ or the seller is trying to hide something! They can be good at hiding corrosion and scuffs etc... too!