At the end of the day, it's your car, it's your choice.
However, to suggest they don't do anything is daft. Balance, vibration whatever you want to call it, they do make the engine smoother. Maintained correctly, there is no danger to the cam belt.
I will be keeping mine.
who said it doesn't do anything? we're all in accord it removes a bit of vibration esp, at low rpm...
and how many 'maintained correctly' belts, cam or balance have still gone awry?
we're simply saying you don't harm anything by leaving it off and the benefits are:
1) improved economy and crank hp (however small)
2) reduced risk of leakage due to worn balance shaft seal wear (common issue)
3) completely removed risk of BB failure leading to cam belt failure
4) (optional) raucous and a bit more raw engine trait...
I would argue that on 10yo+ cars, it may be smart to remove it - unless you are keen on repalcing seals and expensive BB kits... (just as the cam belt kit it gets expensive to replace the lot, not just the belt)
NB: the 1.8 and 1.6 does not feature the BB at all, and really there isn't that much of a performance gap b/w the 1.8 and the 2.0... sooo... make of that what you will.
As pointed out - it's up to the owners of the cars - but i feel there is some slavish commitment to what alfa (or i should say fiat) did with the design... If you like it, good for you.... but there are tinkerers out there who like to experiment, and the insinuation that it is wrong to do so, isn't really what a technical forum is about IMHO..
we certainly shouldn't be scaring people off a harmless 'modification' that can bring reward and savings, if the owner doesn't mind a bit of vibration at low engine speed. A lot of people won't mind that at all - especially the kind on a technical forum.