Lifeshine on my previous cars has always worked well. Three years old now on my Passat and it still does not need waxing.
The bag of goodies is not relevant its the paintwork treatment that is important. So bearing in mind that it also includes treatment of the seats and carpets I think it is well worth the money.
3 years old and the car does not need waxing?really?
Unless your passat does not come out of the garage surely that can't be right, even on the cars I've had detailed by a professional where they have put on a highly durable last stage product the most I've seen is about 6 months effective protection but I suppose my car is in daily use and my washing techniques (allbeit decent) probably wear down the LSP quite quick.
If it was me I would personally not let the dealer touch my car for 2 main reasons...
1.You can do just as good a job if not better yourself(with a little time and care) using much better products than the dealer uses for cheaper.
2.A protection detail from a professional detailing company usually costs around £200 so I'd be inclined to say if you were going to spend the money, give the job to a professional and enjoy far superior results.
If you know or find out what swirl marks are (fine scratches on the clear coat) don't bother paying £300+ to have these corrected by a detailer because unless your car is going to be completely pampered and rarely be driven and you have all of the top end kit (££hundreds upon hundreds) AND you have a very safe and effective technique AND you enjoy spending countless hours on your car....the swirls will re-appear and you will wonder what its all worth especially when a good coat of wax will hide most of them and provide good protection.
A rambled on a bit here but I've basically came full circle from not knowing a lot about car care/detailing-----to knowing a bit more and buying some products------to becoming obsessed with detailing and spending more money-----to getting my cars detailed including correction and buying yet more products (were over a grand here)----to finally realising the results are only temporary if the car is a daily driver and you don't want to spend ages cleaning your car following certain processes and decided that a good polish and wax+once a week wash+once every couple of months re-wax and valet the car myself IS PLENTY!!!
I now await the detailers to come and absolutely roast everything i've just said...but bear in mind it was only my personal experience