We have used the Zimpure 2 + Papa Control with our Prusa MK3S for a year (about 1000 hours of printing) in a small room, always with ABS filament. Before that, one of our employee working in the same room was having frequent head aches after printing large parts and we could clearly smell the ABS fumes in the room. With the Zimpure, the smell is completely gone an no more headaches.
I absolutely recommend this product. We cannot ventilate the room here, so the Zimpure is a must and the filters really work well. I don't know if all toxic fumes are filtered, but given that we cannot smell anything at all close to the printer, I feel much safer with the Zimpure.
I have been using the Zimpure 2 in combination with a Ultimaker 2+ for over a year now, and I have to say it's been a great experience using this device. Especially when you print with materials such as ABS or composites (Wood). Previously, my entire room would have smelled like plastic/wood when doing long prints 10+ hours, but with the Zimpure that's no prolem! Before I had the Zimpure I regularly had failed prints because of warping due to the open window setting at home, but since I own this device, I never had any failed prints due to warping.
Great product and wonderful people.