I've never had an issue, but a couple observations: Get the ECU update--it fixes the issue of turning the key to the ON position, then waiting more than 4 seconds before starting, which can result in the fan not coming on (or just don't pause in ON during starting). Keep the radiator clean and don't block airflow with too much stuff in front of the radiator. If you are unexpectedly seeing 3 or more bars, burp the crap out of the radiator by raising the front end 30 degrees and running the motor until at full temp--5-10 minutes? These tips are from previous posts here on hondasxs, not mine.
For my wagon, I added shrouds to the exposed bottom corners of the radiator using 30 gauge galvanized sheet steel from Home Depot. I also adjusted the temperature for the fan to run from OEM on at 222 and off at 220, to on at 220 and off at 217. But that's overkill. Pobably 99% of owners never have an issue.