TCI on my '82 has done the job well so far. I have replaced the original coil (casing was starting to crack) and the plug wires and caps. "Older" and "newer" are relative terms - TCI-equipped XS650's are 30 years old now, and time takes some toll on electronic components. Information is available on this site about how to repair TCI's, component replacement, re-soldering, etc. Whatever system you like, it's still quite important to keep all the wiring connectors and grounds clean and tight.