OT It's funny how depending on where and when you read about a topic, an answer may be different. As regards crush washers, 'best practice' says or has said to replace them each time. So much so now that many cartridge filters include not only cartridge housing gaskets but crush washers in the box, Napa Gold/Wix is one such manufacturer. Same goes for some Honda spin on filters sold online, some come with the crush washers. Do I change the crush washer each time, not usually, but it will certainly never hurt to change them at least occasionally.
As for the Filtec A01 I believe you are referencing, some/many here seem to prefer them because of their construction to the Fram made A02. As for efficiency if that's a consideration, not much known, but if similar to other no end cap type filters and the A02, Likely not very efficient as compared to other readily available silicone adbv filters. But still, likely more than adequate.