Good power, would recommend but a few small changes would make the Micro-Pedi even better [SEP] So far, I'm pretty pleased with this buffer, but there are a few small things that I think Emjoi could improve on. I was able to use this buffer for both feet after only charging for 30 minutes, then plugged it in for the recommended time. It would be nice if the red light ever went off to let you know when it was charged, but this hasn't been an issue since it's always charged when I need it. I don't know exactly how long a full charge lasts, because I've never run it all the way down buffing both feet (about 15 min). The power is good, although I could see that a man with really thick calluses might need more power. It does slow down a little if you press down really hard, but at least on my feet, pressing that hard hurts. So for my purposes, the power is just perfect. The blue buffer has lasted 4 uses so far and seems to still work fine, which is pretty good considering how much has buffed off my feet during these first uses. The primary reason why I'm giving 4 instead of 5 stars is because of two things: 1) the rotating head isn't viewable 360 degrees  (i.e. covered on one side), so it really limits the ability to see what you're buffing. It's particularly hard to use with your non-dominant hand on your opposite foot, because you can't see what's being buffed unless you're looking at the skin from the side. I have friends who have the Amope, which allows you to see your foot better, but has insufficient power and isn't rechargeable. 2) the buffer/roller on this Micro-Pedi is inset pretty deeply between the side pieces meaning that you can't really buff anything that's not convex  (i.e. can't really buff flat or concave surfaces on your feet, only things that stick up/out like heels and toes). This means that I can't adequately buff the callus just below my 2nd toe on the ball of my foot, which is a slightly concave area. As this is my worst callus, that was very disappointing. Press as hard as I might at different angles, I just can't get that spot with this buffer. But for my heels, toes, and the rest of my foot, it's great. So overall, I would recommend this product based on the batteries saved by recharging, the power, the comfort in your hand, and it's effectiveness on most parts of my feet. But I wish the side pieces didn't stick so far out beyond the roller limiting usefulness on concave parts of the foot, and I wish the roller wasn't covered on the back limiting visibility.