If it restarts say once a week or in 2 weeks.. It's considered "normal" due to a persistent bug. But every 3 hours is major problem. If still within warranty, call TM right away and have then replace it. If still unsatisfactory, then consider buying your router. I'm still using the C1200 and it's satisfactory.. I don't check as religiously as before, but I probably get a reboot or 2 per month. That's fine by me.