Excellent spot-on, a very effective one indeed
No irritation, no mess, easy to apply and for me it's highly affordable.
We have used this product for more than 12 years and have found it to be perfectly effective on all bugs listed. However, the ear mites are becoming resistant to it--so will switch to a different product for a while to get rid of those darn critters. I will switch back to Revolution after the ear mites are completely gone.
Finally, the mission to protect my feline from multiple parasites is completed by using Revolution. You believe or not, this once a month topical treatment has really power to prevent heartworm and also ear mites. I absolutely love it. And so far, no any complain about any parasite.