We've had our seal for about 12 years. If someone didn't run a knife through it taking out a big chunk it would still be usable..
That said I also have a Royal sovereign, been using it for 6 years and it's still works just as good. We bought the cheaper version with the thin roller... So I never considered it as good as the seal, wasn't as fast and there was a slight drift compared to the seal.
We're finally replacing our seal and getting the top end Royal sovereign. Supposed to be delivered at the end of this month...
This post got me worried so I had to ask, apparently the US branch is closing... The manufacturing branch and the Canadian branch is staying open, so if you are in Canada you can still buy Royal sovereign... At least for now. My understanding is only the US division is closing.
Which is weird, usually it's Canada that screwed because our population is like 10% of Americas. It wouldn't surprise me if whatever is going on get sorted out eventually and they just ship out of Canada to America in the future.