no-claim bonuses: underrated money saver or just hype?

Been renewing my car insurance lately and realized something kinda obvious but still worth mentioning - those no-claim bonuses really add up over time. I mean, I knew they existed, but didn't realize how much difference they actually make until I compared quotes with and without them. We're talking a pretty decent chunk of change here, especially after a few years of clean driving. Curious if others noticed the same thing or have other sneaky insurance tips to share?