Huber Optik is high quality ceramic film so yes, it is expensive. I am also looking to tint my Magnetic Gray S but I still have not decided. From the research I have done this is what I have found:
Metallic: high heat reduction, somewhat reflective, potential glare, extremely resilliant to scratches/scuffs, low risk of discoloration/fading (metallic component creates dark color, not dye), inexpensive, problems with signal interference (WiFi, GPS, Bluetooth, cell phone, AM radio, some keyless entry)
Carbon: high heat reduction (about 10% less than metallic), not very reflective, no glare, highly resilliant to scratches/scuffs, small risk of discoloration/fading (film is dyed to achieve color but this is still far different than old polyester-dyed tint), inexpensive (similar to metallic), no signal interference
Ceramic: highest heat reduction, not very reflective, no glare, highly resilliant to scratches/scuffs, low risk of discoloration/fading (ceramic component creates dark color, not dye), expensive (about twice the cost of metallic/carbon), no signal interference
Most higher quality tints will come with a warranty but pay attention to their length and what they cover. Some cheap tints come with 1 or 3 year warranties versus a lifetime with better tints. Shops can sometimes give you the option of a lifetime warranty but it may cost more so be careful. Good warranties will cover bubbles, delamination (layer separation), crazing (fine cracks), adhesive failure, cracking, and peeling but the best warranties will also cover against fading and discoloration. Some shops offer "no fault" warranties to cover damage or window replacements but this is NOT from the tint manufacturer, so if the shop closes you are screwed. Keep in mind also that the warranty covers the tint film - not the labor, you will most likely pay to have your tint fixed (unless the shop owner is nice or you originally bought it from them).
Some tint shops use a computer-controlled plotter to cut the tint to the factory specifications of your window, this may increase the price of the tint job. Many shops still use hand cutting to fit the tint. Some people feel the plotter is more exact but other feel hand cutting ensures a perfect fit because it is custom - you can decide. Opinions of quality are mixed on which method is better, it honestly should not matter if the person installing the tint knows what they are doing. A bad job is a bad job regardless of who cut the film.
Honestly across the board most new tints are fairly similar but if you are in to the small details then those differences will matter. Many new tints, regardless of material, are very unlikely to fade or discolor. I am considering getting SunTek Carbon 35% all around on my car, I was quoted $99 (scarily cheap in my opinion) but I am not sure if that includes a lifetime warranty. The tint shop I will most likely use has been around for a long time.
Sorry for the long post but hope it helps. If anyone wants to add/correct what I have said let me know. Maybe we should make a tint sticky? :naughty: