I've had the opportunity to test several Smatree products lately.
Their pole, case, battery charger and gooseneck mount.
I have to say they make excellent products. Not cheaply made junk like some others I've seen. Their products are made to be used over and over again without breaking or wearing out.
Example, the pole is made out of aluminum so it is strong but still light enough to easily transported with you. Even the mount end where the GP attaches is aluminum. They have integrated a captive nut so you don't have to worry about losing it when mounting or dismounting the GP. The lanyard on the other end is thick enough so it doesn't cut into your wrist or break the first time it gets tugged.
Their case has a nice set of cutouts to hold your camera and accessories tightly in place. There is a small zippered pouch inside the top cover that holds small items or cords. The outside is strong enough to protect the contents without being too bulky to pack or carry for a day trip.
The gooseneck clam is strong enough to hold your GP in any position you could ever want to point it. The clamp is nice and wide with plenty of holding power to grip almost anything you would want to clam it to. It can be rolled up small enough to carry along in case you decide to set it up while out and about.
The dual battery charger is very small and has dual charge indicators so you can see the status of each battery. If you add a wall USB charger to this you have a very nice small portable unit for travel.
If you are looking for any accessories for your GP, consider the Smatree line as their products are well made and should last you a long time.