Review (5/5): Best epilator I've owned
I have been using an epilator for +20 years. This is the 3rd I've owned and by far the best. Design is great. Removes hair easily. Barely feel it. Also, is the first epilator I've been able to use on my face without reaction. The trimmer also works great too.
I highly recommend this unit. Over time, your hair will thin. My legs have very sparse, fine hair. As it grows, it is so soft/fine, it is barely noticeable.
As for lasting 3 to 4 weeks, not so much. I truly believe it depends how fast your hair grows and how smooth you want to be. Definitely a week or 10 days of smoothness.