New Sora groupset - any good?

I'm seeing this on a lot of cheaper bikes now and I'm intrigued, especially as I have the older Sora on my Spesh Secteur.
It's been OK but not fantastic and one lever gave up after 2 years. When its properly serviced though the shifting is pretty smooth.
How does the new one compare? I've hired bikes abroad that had 105/Ultegra on them and haven't been blown away by them, so if Sora is better than what I have now I can think about my next bike in terms other than what groupset am I getting for the money.
For instance, I've fancied the Spesh Roubaix for ages but to get 105 on it you're paying £1800 while a full Sora set up is only £1200.
It's been OK but not fantastic and one lever gave up after 2 years. When its properly serviced though the shifting is pretty smooth.
How does the new one compare? I've hired bikes abroad that had 105/Ultegra on them and haven't been blown away by them, so if Sora is better than what I have now I can think about my next bike in terms other than what groupset am I getting for the money.
For instance, I've fancied the Spesh Roubaix for ages but to get 105 on it you're paying £1800 while a full Sora set up is only £1200.
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This is exactly why I use Campagnolo too. If you are thinking for changing, I would try Shimano/Campag/Sram levers to see which is most comfortable for you (they all shift well).