'Cheesy' Sigma cadence connections have survived 3 bike changes. Easy to use slip on terminals.

Sigma will also sell you <i>parts</i> if you need them. Some other companies make you buy <i>service kits</i> or the like even if you just need a magnet.

I find I rely on the cadence function now more toward the end of my rides. In the beginning, I'm a good judge of RPM, but as I fizzle out I can sometimes find myself either dogging up a hill, or over spinnng on flats. This is not uncommon.

I've had bad experience with Vetta.