I'm using these gloves as bicycle gloves, and find them well-suited to the task.  They come out when the temperature is between about 45 and 80F.

Visibility: This was a prime consideration for me on the bike.  These gloves deliver, although the palms are nondescript grey, so really only the back of your hand is highly visible.  The orange color is bright, although after a year is already visibly fading from sun exposure.  This is expected, and I don't feel it detracts from the usefulness of the gloves.

Durability: They have, so far, held up perfectly.  I ended up leaving the velcro strap permanently closed, to avoid wearing it out -- there's elastic holding the strap to the body of the glove, which gives enough to get my hand through without feeling like it's going to fall off.  This elastic will presumably wear out at some point, but again, this is expected.  I haven't crashed with them, but they'll do well enough if pressed.  I don't expect them to be too useable after a solid crash, but all I need is protection the one time.

Environmental considerations: These are not warm gloves.  If anything, they're nicely ventilated thanks to the knit back.  Definitely spring and fall fare for me.  I ride in rain infrequently, and although these gloves don't keep the rain out, they do dry out pretty quickly (for gloves).  I've washed them in the washing machine (as advertised) and they came out just fine.

Overall, these gloves are exactly what I was expecting.  They're lightweight, they're visible.