THe mags with bio wheels are OK filters. But, IME they require much more frequent maintenance due to the relatively small media container with such a large flowrate. Especially if you use the micron cartridge. I do not do maintenance on any of my prefiltered canisters more than once a month. My mags are signficantly louder than any of my other canisters. Also, IME the mags are very peicey and they are the only filters I have ever had to buy replacemant parts for. I don't use them full time and I have to replace those foam seals about once a year. I do not and would not use bio-wheels because my alrger tanks are planted and the bio-wheels gas off the CO2 I am adding to promote plant growth. As far as amount of time to clean, nothing beats my Filstars.
All that being said Mags are decent filters that have their place, just not as a primary filter on my tanks. I do use them for circulation, a secondary mechanical only filter, or a clean-up filter. Filter maintenance is just work to me that I try to avoid all I can, and the mags require it too frequently for my tastes.