Any good? Yes, it is. Little cumbersome to work with but to be fair it is a great tool and a reasonable price. In fact, every hobbyist should have it. Why you ask? Here is why:
1. Par meter. It does a decent job and gives you an idea. Better than not having anything or renting one for 70 bucks or so.
2. Out of water alarm. This is by far the best bang for the buck and why the cost of 200 dollar is moot. If you place this in your sump you can get an email notification that it is out of water. This may or may not mean anything but it could also mean the sump water level is low or a issue happened and you need to react. It is a great feature and another redundancy check.
3. Ammonia reading. If you run isolation or QT tanks you can place this in there, add a new slide, and get a good ammonia reading. Nice to have in my opinion.
One of the BRS videos on par meters shows that the Seneye is close to the higher dollar ticket items. It may be the one below or another one I didn't have bookmarked. Sorry about that but may get you started never the less. I own one and believe it is a great tool to have in our tool box. Par and monitor alone are great and well worth the price. Slides, I only used the one it came with but like the option.