I have tried:
S-76 QDS (Quick Delivery Shine) - 1gal.
S-44 Leather Lotion - 1qt.
C-61 PRO-Sol - 1qt.
P-11 Creamy Cutter - 1pt.
P-21 Swirl Eliminatorâ„¢ & Polish - 1gal
ACG-18 Glass Cleaner - 1 Case - 12 cans
PRO F-17 Smoke and Odor Eliminator - 22oz.
The QDS was a decent QD, is was pretty cheap, so I gave it a shot. There are better QDs out there for a similar price. (Megs Final Detail or the new equivalent.)
I liked the leather lotion, but since most leather is coated, a diluted waterbased vinyl dressing does just fine as well. It did work well on my sister's leather couches though (real, uncoated leather of course). Plus it does have a nice leather scent.
The PRO-Sol was as good as any other safety solvent. Removed adhesive residue.
I didn't work much with the Creamy Cutter as it is very aggressive.
I was looking forward to using the Swirl Eliminator, but was very dissapointed. I did only use it by PC, maybe it would have been better with a rotary. Megs DACP, SFP, or similar 3M, etc. products work better.
My favorite product from them is the aerosol glass cleaner. It is alcohol based (safe for tinted windows) and with the right towel will leave a very clean, streak free window.
The Smoke and Odor eliminator is an alcohol based product, very similar or exactly like the Meguiars smoke and odor eliminator (yellowish/amber bottle) that can be found at K-Mart or the like. I didn't like it at all. It left a very strong alcohol smell and didn't remove odors that well. I highly reccomend the Valugard Odor Eliminator (
www.autoint.com) over it. There should be some old posts about it if you do a search.
Not to hijack the thread, but if you are looking for more pro oriented products, I highly reccomend Valugard. I have been very pleased with every single product I have tried from them. I reccomend their Odor Eliminator, PreConditioner Cleaner, ABC neutralization system, and I have read very good things about their Finishing Wax and OEM One Step. A search should yield results on all of those products. You can buy their products at the Store on their website. Also, check out some of the Tech Tips and educational material.