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I bought the massive multicolor set. These things are durable for long term use, but are not made for hot swap. I started with the orange, when I pulled my device out of it to swap colors for the first time, I pulled the pulled the rubber seal out with it. Also, the original one had more color to it, I am now using the black one and it got dirty and faded MUCH quicker than my original. In fact, after a year, the original stayed black the whole time, this is already starting to look greyish white and it has only been a month.
For the amount you pay, it does what it needs to, but for swapping out or looking for a premium product, this is no different than getting a phone case for $10 to avoid having to pay $50 or more for a decent one.
I love the colors, but I have a horrible time getting the little piece to pop into the holes. The ends by the watch, stick out much further than the original as well, leave large gaps between the band and my wrist.