I give this 5 stars because it's very convenient to use. I usually have to get in the shower to shave. With this, I can shave my arms without having to be in the shower. Also this little razor works very well! It does take a little longer than a big razor, but if you don't always have that extra time to spend in the shower or tub to shave, this is very convenient!
I haven't tried the nose trimmer so I can't say whether that works well or not. Personally, I won't use that function. I wanted to add in that it even works well on my leg hairs though!
I highly recommend this for moms or anyone who is busy most of the time! For the price, it's definitely worth the purchase!