I've got a pair of Maxspect Gyre 250's. Yes, they need to be taken apart and cleaned occasionally - just like any other piece of equipment we use.
Once you learn how to take them apart and reassemble them correctly they don't take any longer to clean than any other power head. IME, if they are noisy it's because they are not assembled correctly. At least for me, it's getting the rubber bushing to seat correctly.