pretty good odor control
584096
After a bad experience with the Arm & Hammer unscented cat litter, Fresh Step was the next one I tried.  (I have a cat with a urinary tract condition and my vet has recommended unscented clumping litter as one of several strategies to help him with his condition.)

As the other reviewer has mentioned, there is an odor or fragrance when you first dispense the litter.  I agree this is not quite unscented, and that's why I took a star off.  For what it's worth, this fragrance does not persist for long; it pretty much dissipates within a few minutes.  I'd say the dust level of this litter is average.  It's not low-dust, but it's definitely not the dustiest I've tried.

I like that this comes in 25-lb boxes instead of just 20-lb boxes.  I can get by with buying three of them instead of four.  This is easier on me financially, plus I don't have to cart around quite as many boxes each time I buy it.

But what I really am most enthusiastic about is that the odor control with this litter is very long-lasting.  I have four cats and four litter boxes.  Naturally, one litter box is more popular than the others (I don't claim to understand cats' thinking!).  I scrub the boxes and fill them with litter about once a month, scoop about three times a week, and even in the most popular box, I never get a urine smell.  The litter clumps as well at the end of the month as it does at the beginning.  (Occasionally I add a refill box of litter partway through the month, to top off any low boxes.)  I am thus able to remove the urine clumps, and my house does not smell like cat urine anymore!

For what it's worth, my cats are not at all picky about litter.  They've gladly used whatever I've provided, which includes the Fresh Step.
1873327
Pretty decent for a small plug in- eliminated some odors when put by my dog bed(dog urinates on since she is old and lost control of her bladder).  Dont expect miracles though, its just a plug-in.
1723691
Wasn't sure if the cat would like this system...but so far SO GOOD!  Have been using for about 1 week now for our 1 cat and it seems to work well.  I don't notice the urine odor at all like I did before with traditional scooping cat litter and we just changed the pad out, which lasted about 8 days.  The solid waste does stick to the pellets a bit, so some get tossed out when scooped, but overall I love the ease of this system and am very pleased with the odor control.  So many "scented" cat litters give me major headaches and this controls the smell without any fragrance.  I also like that it wasn't $100+ like many other systems and that the cat doesn't "kick" it all over the place as much.  Recommended.
1556722
This sanitizer works, especially for those particularly foul bathroom odors or strong lingering cooking odors (of which in our house can last for days). I use it for instances where the offending product has been removed but the scent remains.

Oust can be a problem for those with asthma, as most of my family suffers from. I usually just spray the room and close the door or spray the room before I leave the house for the day. I use it sparingly and not too often. Otherwise, it just too hard to breath. My dog is even bothered by it. She just starts coughing, sneezing and gagging.

There is a warning on the canister for people to try it out in one room for 24 hours to make sure no one reacts to the product. Just be forewarned that they are not kidding.

The actual instructions the canister state to spray the room, close the door until the spray settles, and then resume normal ventilation.

After the spray settles, the room smells nice and fresh and there is no hint of foul odor.
989576
I love this litter box odor controller.  It helps a lot as the litter box is in a corner by the washing machine.
3313119
My husband had me order this once I moved into his house shortly after we got married. My sinus allergies were acting up really bad, since I'm not used to living in a home with windows constantly open (the house has no need for a/c because of the ocean breeze, but it lets in more dust). It's quiet when on "germ" mode, otherwise you'll have to get used to "white noise." The purifier appears to pick up a lot of dust, as we've had to replace the filter several times already. It does help get rid of odd/stale odors (especially when the house is locked up). I like the purifier, though I could do without having to change the filters frequently because the filters can get expensive.
2251528
Easy to use and keeps odors at bay.  The catch to keep it open is not as good as I would like because if you do not get it right it shuts when you don't want it to be shut and drain properly.
878342
This air filter works well for controlling smell in the bathroom where my kitty litter box is...I scoop daily, but there was still some odor. This little thing takes care of it. I tried using it in a bigger room to control my rabbit liter box smell, but it didn't do so well in a large room. Great for my bathroom however.
3267618
Fairly good at filtering odors. I'm allergic to a lot of things, so it doesn't take long for something to get into the mask that bothers me.
Thus, I seem to be having to change the filters more often that the every three months indicated as a likely time for use. But the company does say that the use varies with the individual. Purchased to combat cigarette odors from neighbors. But, I think I should be also able to go for walks and do more outdoor activities without being bothered by my allergies. I suppose I'm tough on rating things--
but I'm not giving something 5 stars unless it's perfect!
900762
Smells isn't over powering, and the other smells aren't there.

Will buy again.
107363
Pleasant odor, but just don't use too much of it, or it can get overpowering.  A little too artificial flowery smell, but a definite improvement over kitty litter box smell.
2507411
I have used a similar Ionizer for a little over three years which worked quite well to control odor of multiple litter boxes until recently. I purchased this one which is a somewhat larger unit to replace the old unit. I chose this ionizer because we are moving to where the "cat's room" is somewhat larger than the current room. I have begun using it here and the odors are under control again (except of course when one or more kitties decide to "dump and run" with no effort to cover their business. Even then, if don't immediately walk by the room, the ionizer does a good job getting even that particular odor under control.
1105535
I use these things constantly, and they work really well at covering up the smells of a litterbox, trashcan, and A/C unit that got water in it. I would definitely buy them again. They don't quite last 30 days with the same effectiveness, but they're still a solid product--and you can't beat the price.

Pros:
-Really good at neutralizing bad odors, period
-Very easy to use
-Cheap

Cons:
-You really need to replace them more often than once a month because they start to lose strength after about three weeks. Just get two and switch off midway through the month.
-Smell is a little sweet--doesn't really smell like "after the rain"--and that might be off-putting to some
289335
This product definitely took care of the odors I was dealing with when my cat decided to forego his litter box for a couch in a spare room.  The smell was a little strong but has dissipated over time.  Luckily it's in a room where I was able to open windows and run a fan to help get rid of the chemical smell.  But even as strong as the smell was, it was an improvement over cat urine.
2290046
This product seemed to keep odors at bay and also seemed to break down solids.  My sensor stills seems to be out, but you can't always have everything!  Good product.
4624741
Really works well on stubborn odors. No need to blanket a room with sprays - just 2 to 3 short bursts will eliminate odors immediately. Good value for the price.
1251999
This product worked pretty well. The scent is a little overpowering at first, but it settles in as it dries. I didn't find the odor offensive like some might, but I wasn't crazy about it either. Overall, it worked better than anything I've tried.