Most media reactors are terribly burdensome when it comes time to clean and change them. Hoses fall off, o-rings fail, you need tools to open them, the sponges clog, etc.
I wouldn't see some of this as being a problem here. However, how fast does the light at this spectrum grow coraline algae? Can the light be removed and fully soaked in vinegar? Are the tabs to open the unit easy to remove? Does the o-ring fall out when you open the unit and get lost? All seem stupid but can make maintenance more difficult that some might be willing to commit to. That's I guess what I was referring to.