Very powerful only had it for a couple months but very powerful the only thing is that it needs to be filled daily which is ok with me.It works fine. Just had to get use to the buttons. I haven't traveled.I have genetic periodontal disease & this water flosser has helped deep clean & oxigenate my gums to the point they no longer bleed when I brush & they feel so much better. I like that I can use both water & mouthwash in it. Several tips for sanitary use & easy change out. Small enough to handle with ease.Love get in between teeth easyWorks well easy use make sure you choose the best setting for you!It does what it's meant to doFive years ago I actually healed (shrank) several deep pockets that needed "deep cleaning" with an irrigator almost identical to this one. The irrigator finally died, and I got this one to replace it. The designers added a tongue-scraping tip that's excellent, a wonderful addition. The designers enlarged the water reservoir substantially, a very questionable change: the older irrigator was lighter and easier to handle; since a careful cleaning, even with this larger reservoir, requires a refill, I don't see the point of bulking up an already handy device, and if you're not going to clean carefully, why use one in the first place? But the worst innovation was the height of the new, enlarged irrigator: it just barely does NOT fit in a standard medicine cabinet, so I had to replace its larger reservoir with the smaller one from my defunct irrigator to keep storing it inside the cabinet. You know what they've told us about aerosols from a flushing toilet contaminating everything exposed in small bathrooms! (If you don't know, find out.) So, this irrigator deserves five stars for its functionality, but I have to subtract one star because the designers made a serious error that detracts from the unit's portability and also from its practicality in homes with standard-issue medicine cabinets.I was so impressed with this pic and the features and specially the pressure. But it just broke 9 months to the date of purchase. It won't turn and not sure if the switch isn't working.