I easily give this a 5 star! Easy to use, easy to assemble, Comfortable!
I previously had the band that came with the Fitbit Alta and struggled with getting it to fit my wrist tight enough without being too tight. This band gives you the flexibility to fit your wrist in a variety of areas (the holes are what you use) similar to a belt! I like the extra support of looping it through the loop in addition to "buttoning'".
The material is very soft, I am going to assume its a silicone? Similar material to the original band but more flexible and soft to touch!
The only "con" I would include is that there is no instructions so if you have never switched out your Fitbit it might take a minute to figure out how to dismantle the original band. (There is a small button you push in on the edge of the Alta, push in and slide the Alta down and it will dismount from that side, repeat on the other side!) Also the packaging is a little bland but as long as its not a gift who cares! I throw the boxes away anyhow!