Oh dear, more Selespeed Bashing again.
A light clunking noise on up and downchange is normal but if your gearbox is crunching on the up or downchange it is most likely to be a synchromesh problem.
The Selespeed is mechanically identical to the manual gearbox internally, only difference is first gear ratio, everything else interchanges with the manual gearbox.
If you have a synchro problem, get it fixed and enjoy your car- the faulty part is IDENTICAL to the one in a manual gearbox and the probability of failure of this component is actually higher in a manual as the driver has much greater ability to abuse the gearbox.
Why is there so much complaining about Selespeed? I have driven several 156's since 1999 (V6 and Twin Spark) none have ever let me down and my favourites have always been Selespeeds.
Sure the system has had some issues and if your dealer doesn't have training and experience it could take some time to solve some obscure problems.
As for the cost of repair- I can't see what the complaint is about. The gearboxes are simply a conventional manual- all internal parts are available and quite cheap.
I have a friend who is an ex Alfa Technician, currently working on VW's- apparently German cars also require repair occasionally too!
We calculated that you could buy 5 complete selespeed Gearboxes for the cost of one VW Passat Automatic transaxle- yet I don't see hordes of VW buyers avoiding them because of this...
If you like the Selespeed- buy it. If you need a warranty to give you peace of mind- find a good one that is worth the premium (in most cases you are better off saving your money and spending it yourself if you need to)
Don't be scared of technology- all cars break down sometimes- it happens. If you have a problem-take the time to find a mechanic who can fix it properly and get on with enjoying the car.