Strengths: Once you've cleaned all other lubes from the chain this stuff stays on well in all conditions that I've come across and doesn't need topping up during longer rides.
Weaknesses: Can get a bit messy when applying to the chain. Needs a few hours to set so that dirt doesn't stick to it. This is not an apply then ride lube, you'll need to lube at least the night before or just lube after cleaning the bike then it's ready for whenever.
Overall: I bought a litre pack in the end and top up my old battles as necessary. I'm halfway down the litre after 18 months.
Make sure the chain is grease free before applying
