At the time of purchase, this was the best deal for a spacer for an inhaler. It's basic, no bells or whistles, literally but I have used them before so I didn't feel like it was necessary to have the whistle to tell me that I was inhaling too fast or something. It does exactly what it says and if you've already used them before and understand how it works and what to do then it's just a really good deal.Perfect for my son, easy to cleanPerfect for my 96 yr old father, hand reflex and administering albuterol routine almost impossible for him. This devise allows him to inhale albuterol properly via the chamber. Very pleasedI didn’t really need the mask, so I keep it in my car’s console for emergency use in case someone needed CPR. I was concerned that my round inhaler wouldn’t fit, but it was just fine. It comes with a case which is really nice!I had purchased one previously. With my daughter in softball and gymnastics, it was perfect for both athletic bags. Small, compact, easy to use especially for kids 5+I like how it helped me get my meds down like I should. So much better than not having it!! Glad I got this itemSpacer works great! This spacer works for adults (without mask) or kids (with silicone mask). It has a cap for the mouthpiece, a whistle to let you know if you are inhaling too fast. Easy to clean. It is really helping me use my inhaler better. I read many reviews and wasn’t sure what to buy, but this works well. So glad I purchased it.For my son to help him breath better.