I bought the Tilta TA-BSP 2 to power my Panasonic GH5S with V-Mount batteries.
Positive surprise, that the battery baseplate is so lightweight. Haven't used it a lot so far, so I cannot say anything, how sturdy/robust it is.
It would have been good, if Tilta would have added an ON/OFF button for the battery.
There is a small blue LED light on, once the battery is mounted. So in order to avoid, that energy is being drained from the battery, when the camera is OFF and you store the mounted baseplate together with your camera in your backpack, you have to remove the battery.
That's why the rating is 4 stars only.