"Did a lot of research on air purifiers and settled on this one as it fit in our budget and had some good reviews. Compared to the more powerful, more expensive air purifiers out there, this one is much much lighter (about 17 pounds) and the filters last much longer (18 months) and are much cheaper to replace.
This model is super quiet on the lower settings and even on the high ones aren't deafening. The best thing about this one is the gas/smell sensor and the particle sensor. They really work and do a good job of maintaining clean air in the room. The remote is handy as well.
We live in apt next to a smoker and those smells seep through the old building but with this handy device we don't even notice it anymore. Also, the unit does a great job of keeping pet smells at bay, litter box odor is virtually nonexistent now.
We went for the more expensive BioGS model and the blue color. I think the only difference between the models is capacity and in an apartment the extra capacity is great. I will say the color is just ok, if I could have seen the unit up close, I would have just bought the silver one. Also the display is bright (can't turn it off) so if you have it in your bedroom just cover the display and you'll be fine.
From all the info out there about air purifiers in general, I was worried about spending hundreds of dollars on something that may not meet our needs, but I felt this one was worth every penny."