I don't have any experience with the Mother's vlr, but how did you like the megs aloe leather cleaner?
I did a few test spots on my wife's '03 Explorer (which I think was a good idea before tackling a Porsche that costs more than my house

)
To say the Explorer is well used is an understatement, I don't like detailing SUVs and hers is even worse because it has that demon trim everywhere that attracts wax and never lets go, so I don't do it often (ever). The car is a light brown with a tan-ish interior (plastic vinyl and rubber). First I tried it on the driver's inside door armrest/handle which was nearly black in places. I spritzed a little of the Megs leather/vinyl cleaner on the top of the armrest and watched as some of it ran down the sides, almost instantly causing clean streaks. Since it was so bad I decided a little bit of agitation with a soft toothbrush and a mild scrubber pad was in order. So after a few minutes of agitation with the toothbrush I wiped the slurry (the cleaner foams up a bit when scrubbed) away with a dry mf towel, I know I should have used a wet/damp cloth, but this was only a test spot.
When I wiped, the towel turned black and the armrest was tan again - even in the textured creases etc. So I moved to another area and tried again, this time with the scrubber pad on the center console. A spritz or two, a minute or so of scrubbing and ... Oh hell, now I have to do the entire interior. She's not going to let me get away with just clean one armrest and half of the center console.
As a cleaner I have to rate this a 10, because just spraying it on and letting it drip down a nasty rubber armrest and a console lid caused clean spots with no agitation at all. I'm guessing that on anything less than a surface totally covered in grunge, this is going to be a 'spray on, wipe off' product.
I WILL be buying this again. I might even try it on the ext trim that has 10 year old wax still embedded in it.