Is it expensive? Yes! Is it a quality product that functions in the way it was intended, absolutely! It is amazing how far in you can see the tank and how clear everything stays. It does not feel cheap it is well built and heavy. It does come with a magnet to place inside the tank and it is insanely strong, seriously if you have a thin tank don’t slam it! Slide the magnets together. Personally I take this from tank to tank so instead of using the provided magnet I attach it to the magnet algae scraper I already have on that tank. I breed neocaridina and Caridina shrimp so seeing them in a larger size really helps with eye strain.