I have and use an array of cleaning cars. I have 2 Atlas vacuum/scrubbing cleaning cars (one wet and the other vacuuming), one of the Roco cratex cleaner cars, 2 Aztec roller cars (one with a cratex wheel and the other one with a wet handiwipe). I am of the opinion - the more the merrier. I had a Centreline but I had too many tiffs with it and sold it. I am yet to try a CMX, but at $178 its a little steep for my liking.
Now the next fight. What do I use to wet with - Goo-Gone or Isopropyl alcohol 91%. Goo-Gone is very hard to find this side and if you do it's pricey. IPA is cheap - around $8 a litre but I find GG a better solution. The easiest to clean Kato passenger car wheels - just put paper towel on your track, some GG and run it up and down and you'll be amazed how much gunk (yes, it's a word to me) stays behind. I still use it on a rag to rub up and down the tracks and I love the smell too! I think people don't like it because it takes long to evaporate thus sitting on the tracks and cleaning all wheels coming past and transferring this gunk onto the rails. I remember one chap at the club saying it dirties the track but the ding-dong could not figure out where the gunk came from, no matter how hard I tried to explain its from the wheels.
Years ago, around 20+ or so, there was a huge discussion around CRC-226 and how the guys used that. We found it locally and tried it - 2 out of 5 was happy with it. At that time I moved over to Ireland and I found it horrible as it became so sticky I could even rub my finger over the tracks. Cape Town weather is mild Mediterranean climate where Ireland is, well, wet. My mates swore by it and then the fight started....