As a user of a Reflector, it offers a generous amount of light gathering capabilities.
The cloud bands of Jupiter and its four visible moons, are easily visible in great detail!
Bright nebula are also visible, such as M42. (Orion Nebula)
You can watch the phases of Venus as it progresses throughout the year, and mars also offers a nice satisfying view.
Saturn really impresses even in smaller scopes.
The moon is by far the most breathtaking to observe, as the clarity of craters and edges are amazing.
Star clusters are beautiful to gaze at, and the core of the milky way offers an endless amount of stars!
Collimation is the downside to the reflector, in my opinion. others will surely have a different view of the reflector telescopes.
I Hope this helped!