Even though it is not marketed as a multi-surface cleaner (plastics, metal and glasswork), we initially appreciated the clear instruction and specific purpose it defined itself for. We knew exactly what to expect, and to be wary of overspray, however in our test we were pleased with the performance of this cleaner on first external application of a heavily soiled window. Unfortunately it did leave smears on the internal side that required an extra application and buff to restore to a crystal clear finish, but it is important to note that the window had a dirty film of grease that spurred this, and overall the Armour All made for short work. Because of this requirement to buff to a perfect finish, and the lack of lubricating qualities in its formula, we feel it falls just short of the best in class (Meguiars Perfect Clarity). However it performed adequately as a specialist window cleaner and there is very little difference between the performance of this Armour All Glass Cleaner and the Simoniz Clear Vision. We would have liked to see a little more smear resistance in both, which required an additional buff, but the ammonia free formulation and the quality spray mechanism are what nudges Armour All ahead in our test results. We did find the Armour All faster to dry than the Simoniz Clear Vision, which is important if you want to avoid streaks, but we didn't find this an issue despite it requiring two applications and a microfibre buff internally. 

The Armour All Glass Cleaner retail price fluctuates so much so that it is both more expensive and cheaper than its rival glass cleaner 'Simoniz Clear Vision' depending on retailer (and if you are willing to collect from store). That, despite both performing similarly well, leaves the defining judgement down to the quality of the Armour All spray mechanism. If you have read our test result for the Simoniz Clear Vision, you will know that the nozzle is what really lets it down. Here, the Armour All performed perfectly well in our shake and storage test, remaining leak free even under light compression. The nozzle has three settings, light stream, wide spray and off; and did not leak when inverted. Overall the Armour All was easy to use, with a good formulation and a quality mechanism. However despite the concise instruction and tint-friendly formulation, we would have liked to have seen a formula suitable for bodywork in the case of overspray. It is for this reason that we advise its use with caution externally, but award it a FritzReview Value recommendation.