I love this device! There are so many positives here, but I'll name a few: (1) It has a much better feel in the hand than 2 other devices I've had that were smaller, (2) Being able to charge during a session has made this device my number #1 as I no longer have to swap devices in order to charge one when I notice the battery is low, & (3) This device is easier to clean than other devices. The materials naturally keep the device cleaner especially near the well and where the attachments meet. I've had other devices that are nearly impossible to clean in that area, but not this one. The only drawbacks, and they are minor, are the lack of colors, I would really like a different color device if I were to purchase more than one. The other drawback is I wish it came with more replacement filter screens. Overall, I have recommended this device to nearly everyone I know now.