I bought 10 for $100.00. I received them quickly.
The difference in the air in our house is unbelievable! I have a dog...whew...no smell. I followed directions of one bag per 90 square feet. There was a noticeable difference within 48 hours! I have recommended it to several friends and family.
Bottom Line: Yes, I would recommend this to a friend
Do these need to be charged when you get them before using them?