I've used Nexgaard on my toy poodle for years and have had wonderful results with it. Now with the Nexgaard Spectra it is even better. No more worry about remembering extra medication for heartworm or other parasites. I now have an outside working Australian Shepard that I give the larger dose to. She is a bit more "suspicious" about everything so I sometimes have to hide it in her food but doing this with a one dose a month medication rather than several different medications a month is sooooo much easier. This is a great product well worth the cost.
I love having a good, ORAL, single-dose solution. The spot-on treatments are messy and often ineffective, but this single chew is simple and virtually foolproof. Just a word of caution: It needs to be chewed--not swallowed whole. (Read the fine print.) If your dog just wolfs it down in one gulp, you'll need to cut it into smaller pieces first. Other than that, it's about as simple as one could get, and it works precisely as billed. I've been using it for multiple dogs since it became available, and it still has a perfect record. I highly recommend this product! (And, btw--YES, it is worth the cost!)