I installed this on
BMW 330Ci

Review
Contaminants like brake dust, rail dust, tree sap and tar embed themselves easily onto wheels, hence having to clean them often would be a chore. What I expect from a good wheel cleaner would be its ability(with minimal effort) to get rid of the rough and gritty pollutants/build ups that cannot be removed just by normal car washing routine. P21S Wheel Cleaner Power Gel provides ease of use, at the same time living up to my expectation without being harsh on my wheels. The only downside would be that it is expensive however the results compensate for it.

What I like
Effectiveness

What I do not like
Its price

I installed this on
BMW 320i

Review
The only cleaner that I've known that gets the job done easily. I only had to mix it with a little water, apply it on my rims and scrub my way. The stubborn dirt and grime were removed within just a few scrubs. Other stubborn dirt may take a little bit of time, but if you were to use the usual cleaner, you'd be spending half an hour getting that off! I personally like this Power Gel since it saves me alot of time and gives good results, although it's more expensive than my usual cleaner.

What I like
Within a few scrubs, the stubborn dirt will be gone!

What I do not like
More expensive than my usual cleaner.