I'm pretty happy with the extension. Has the added bonus of offsetting some of the weight on the headset too. Is not compatible with the carry case unfortunately.

I’m happy with the strap. It adds extra juice for meta quest 3 and extending time for fun. . The only grip is that it’s not very comfortable to use it when laying on the back due to the thickness on the back of the strap. But when seating or standing it’s doing its job correctly.

I've owned a couple of these over the years (Quest 2 and Quest 3) but my Quest 3 one has had no end of problems. Worked for about 2 months and now the battery status lights just constantly stay on 4 bright lights and when I test it by plugging the USB-C into other devices (like an Xbox controller) it will charge it for about 10 seconds and then the headset lights fade and come back to full again and stops charging the connected device. Seems to be a common issues looking on Reddit. Still use it for the headstrap but the battery is not working. Not impressed.

Very comfortable great battery power life

I saw many reviews that this was the one to get. But after full charge and next day trial, the quest 3 kept ping that low charging rate and the battery straight up died. And had to switch back to the straight plugged in method. The Factory quest 3 headset didn't last too long but at least it charged. Currently attempting to charge it once again but looking for a replacement to replace the Kiwi with on amazon. Most don't if it dies again back to amazon it will go, don't have the time to mess around with wishing it charges and retains charge, rather it just works. PS: started to recharge it again and within a few minutes goes to one light to lights doing the charging 1,2,3,4 lighting and now nothing. Tried to test it and went from 100% on only battery to 98% in a minute and when charger re-inserted. The pining started again.... it's going back. BAD BUY. Oh! to be honest it was comfortable. only way I gave it more than one start.