I'll never use one again after it let dust into the intake and made no noticable performance increase. Others have had similar results. I think its a snake-oil/marketing thing. The stock paper filters work fine. I did run an Amsoil filter for a few years, and that one worked ok filtration-wise (but no performance gain). It was messy though, so I switched back to paper.

Also (not on the T100, but other later models) the oil can get onto the heated temperature sensor wire in the MAF and cause poor running/performance until its cleaned again.

To me, they just cause more problems than they solve.