Actually was wanting to know the major gripes from the public,noticed I said 'major' gripes as not interested in the fussy p**cks,you know the 'a sparrow landed on my bonnet & left a scratch... I demand a new car/respray' type

However will try & answer your questions,
Generally technical help is as good as other manufacturers.Major gripe is the 'fax to TeSeO' system......crap! Not good when you have to queue for fax machine behind office staff/salesman who are faxing silly pictures to each another.Even then it's a hope I get a reply today! no good if customer due back soon etc....really need a dedicated phoneline direct to TeSeO with a ID number to identify yourself/dealer,most other manufacturers do it(or directly lik to diagnostic machine)why can't Fiat?
A sensor is a sensor (of whichever type) understand how it operates then you understand the readings it produces under particular conditions and the way the ECU acts under this information.Intermittent faults are the hardest/most awkward,but if explained clearly to the customer I find the customer is very understanding and know you are doing your best under difficult circumstanes to identify the fault.They realise it may take a few dealer visits but it's nice to 'cushion' this by collecting/delivering the car to ease the customers inconvience.
Training is as good as other manufacturers from what I have experienced.Instructor knowledge is very good & time is spent explaining any queries,new car courses keep tech up to date.Uncharted problems? well having a ongoing one now & all available information has been released to myself so you could say they have done everything they possibly can.
This is where we get into the realm of almost politics! Can we get parts next day..generally yes but it's more expensive & cuts proffits,Well as far as i'm concerned the car should be fixed & back on road ASAP,not a view of management though alot of the time for the above reason.
I find the parts system not very clear with alot of time wasted trying to identify parts....parts department rather the tech identify the part incase it's wrong & has to be sent back with a resulting surcharge (and customer annoyance) & tech rather parts order part as they use the system daily and it's their job! Items under a certain value cannot be returned,this results in arguments between service & parts department who should absorb the costs.This is true of all manufacturers and not just Fiat.
Salesmen.......well they only talk to you when they need a job urgently done so in the 'food chain' they are placed below flora.All departments have targets to be met,again personally i'd rather see more time spent on jobs/making sure customer is happy.I dont agree with this 'f*ck em' attitude,the car (someones hard earned cash/pride & joy) has been brought here to be fixed by experts and it should be done in a proffesional manner.On the other side of the coin some customers deserve it as they think they can bring their car in on a friday afternoon & get it fixed straight away...what they dont realise is bookings have already been taken by customers (sometimes weeks beforehand) and the work load for that day is completely booked up and these customer should come first.
Obviously parts wrongly boxed are not the dealers fault & it does happen often unfortunally.I would like to see techs being asked more about how long a job should take and being more involved in customer relations i.e. talking to the customer even reassuring them them the fault will be rectified as soon as,this rarely happens as it means 'lost time' but I still strongly suggest everyone asks to speak to the tech working on their car if they have any queries or are not too sure of something.This again reassures the customer & improves relations.There is no better feeling than a customer asking for 'you' to work on their car or even 'tell the tech who worked on my car thanks for doing a good job' because you will NEVER get a thanks from management!
Ooops rambled on abit much there......as usual