My dentist has recommended Waterpiks to me for years and when I found out that there are smaller rechargeable models now that don't require a big tank on the counter, I was sold. I have been very happy with the purchase.
I purchase this item about a month ago and could not hardly wait to get started using it, but the package say charge 24 hours, full time for maximum charging in the future. I use it on high pressure because my teeth are close together and feel it could have more pressure to prevent having to do it twice. I am happy with the cleaning aspects and knowing I have gotten all the food out of my teeth.