I had the band 3 for three years, I put it on the new strap and it's gone, the band is lost

Very good as a strap, but the bezel around the watch faded, causing an allergy in that specific area! While the steel does not fade in that specific area, there is probably a material flaw! Otherwise, it is very nice, lightweight, does not tire during movement, and has a very good clasp without worrying about it coming undone like with the rubber strap!!!!

Very good strap, I bought it to replace my old silicone one.
Quality material, nice feeling in the hand, and secure clasp.
I tightened it a bit (did the job with a needle and pliers) but my wrist falls somewhere in between sizes, so now it's somewhat loose. If I tighten it one click more, it's too tight.
It's worth the money.

Good and lightweight construction, it doesn't tire the hand. I have had it for about 2 months, I wear it daily at work and it seems to hold up well

Perfect, worth its money.

Good strap that gives a more "high-quality" look to the band. The additional links were easily removed with the tool that was included in the packaging. Some initial problems with the clasp (it didn't secure well) were solved with a drop of WD-40 on the spring mechanism of the clasp. After almost three months of use, it remains unchanged.

Very good, with a corresponding watch face it becomes an official watch.
Of course, afterwards it loses its "fitness" function as it is not very convenient to wear it for running, etc., mainly due to its weight, for the same reason I don't wear it during my sleep.
Finally, you should know that it is not very easy/quick to remove the strap in order to put on, for example, the silicone one for running

Very good choice for a change from plastic. It takes a little experience to adjust the bracelet to your wrist. In the package, there is a special tool to remove the pins, remove the pieces you don't want, and put the pins back in. Be careful, remove "slices" from both the right and left sides to keep the clasp in the center.

The material is not something great, probably a combination of cheap metals, relatively easy to remove and put on pieces to apply it, but the 2 stars are due to the fact that the color does not match the actual product as shown in the photos.

The iron pins do not come out with the sim tool that others mention, nor with safety pins and the like, everything went wrong and broke, they even left marks and scratches.. I had to order a special repair tool that will arrive in 1 month.. Pay very close attention, search to find the Link pin remover repair tool along with a tutorial on YouTube.

Beautiful, metallic, and absolutely no problem with water. It is slightly lighter and narrower than I expected, but the lighter weight is actually a positive.

I don't have a huge wrist, but it fit perfectly after removing some "links" from the chain. For a male wrist, I consider it impossible not to fit properly after removing a sufficient number of "links". A special tool for removal is included, which I kept for future use.
CAUTION, strength is required.

Also, to attach the watch to the metal frame, you use a special rubber band that is included in the package. It includes 2 bands for miband 5/6 and 2 bands for mi band 3/4!

Excellent quality, high security so that the mi band 6 never falls - you place it from the bottom side with a rubber band that is included in the strap packaging (it also has a second spare rubber band) and thus the band cannot go anywhere since the strap must be removed. Moreover, because it goes from below and touches the sides of your hand, the side irons from the strap provide some extra protection to the mi band 6 as they are almost at the same height as its glass.

Update after 4+ months of use

It still holds up well, adjusts very easily by adding or removing links, its color has not changed at all, it has protected the Mi band 6 countless times from possible scratches since it is slightly lower than the strap and it does not cause any allergies on my hand even when I sweat due to environmental heat!

It has a very secure clasp and fits every wrist, after removing some of the links first. These come off easily with a pointed tool like the one found in mobile phones for the SIM tray. The watch doesn't fall off at all and looks much more high-quality with this strap.

The strap is almost two-tone! The top part with the bracelet is closer to the color of chrome, while the bottom part is black! I don't mind this! With a modification to the bracelet, it fits quite well on my wrist! It's not as tight as with its own elastic strap, but now it doesn't come off my hand at all. I no longer have the fear of losing it.