Overpriced if charged anything over £50 I'd say. The product itself can be bought online for a few quid, or you can buy some very good wax for less than £20. Bung in some time for someone on a basic wage to wipe on and buff off and job done. £300 allows for a huge mark-up.

If it was such a good product surely care makers would be offering it on their options list and have it applied at the factory.

If you get it bunged in for free as part of the deal, good on you - can't do any harm to have it but my last car had it for free and I soon had done a proper polish/wax myself to ensure I knew it had been done properly.

You have to keep using the Conserver to ensure the warranty remains valid otherwise the the warranty is useless.

It's worth considering buying the product online and either applying it yourself or getting someone else to apply it for you, takes about 1 hour to do the whole vehicle inside & outside, you'll save around £150-£200 depending on the garage deal.

There are alternative products on the market that are worth considering.

That's not good to hear duncanand, did your claim meet what they say on the Jewelultra web site ? (see Extract below)

I'm concerned about the use of the words "virtually eliminated", that implies it's not totally resistant to nitrate etching.

Extract:
"The hard, high gloss protective skin that Diamondbrite creates prevents road salts, traffic film, acid rain, tree sap, insect fluid and other atmospheric pollutants from contacting directly with your cars paintwork. Fading from ultraviolet light is virtually eliminated as is nitrate etching caused by bird droppings (as long as it is washed off within 7 days and treated Diamondbrite Conserver)."

I ended up with a car treated with Diamondbrite for free because of the dealer's mistake, it was ok for a year or two, but I wouldn't pay money to have it done, two coats of Autoglym Super Resin-Polish and a machine buffing is better.