The Fujifilm X-T2 mirrorless camera is an amazing image making machine in a small package. Adding the VPB-XT2 Vertical Power Booster Grip makes it a not as small a package. The question, is it worth the extra weight.
The VPB-XT2 has several advantages over the equivalent VG-XT1 X-T1 vertical grip. Allowing for two batteries gives you a whole lot of exposures and the boost mode that lets your X-T2 shoot 11 frames per second (without the extra batteries you get 5 to 8 fps).
Having the extra hardware and batteries does make for a substantially heavier kit.
There is also a larger hand grip for the right side of the camera which gives you a deeper grip for holding on to camera. The left side also has the secondary shutter and wheels and buttons to match the regular buttons on the back of the camera for when you are shooting in vertical mode. It even has a joystick for adjusting the focus point.
The right side has the lever for opening the battery compartment.
Also on the right side is a pin for plugging in included AC power supply which will charger your batteries (takes about 2 hours they say) and a jack for plugging in head phones for when you are creating movies. The green lights signify that the batteries are charging.
While the additional weight can be felt as the unit is well made and the addition of the additional metal in the extended grip is rugged (thus adding more weight) it does not move the unit into the realm of impossible to lift. It still is a fairly compact package and still comes in under the weight of a DLSR with a vertical grip attached.
I had the VPB-XT2 on the X-T2 with my Fujinon XF100-400mmF4.5-5.6 R LM OIS WR and a teleconverter while out trying to capture the Roseate Spoonbills behind my house yesterday. I was carrying it in one hand on grip without much problem. It felt well balanced. I might suggest you looking into getting a wrist strap (there is a convenient bar on the bottom for attaching same).
If you are shooting sports or wildlife, the 11 fps will help. If you are doing portrait work and prefer having the shutter button on the top in portrait mode you will like this unit. It does take some getting used to. In vertical mode the EVF seems to me to be a bit lower than I would like but that is a personal problem.
This is a good time to buy a VPB-XT2 as Fujifilm has then on sales (until the middle of July 2017) .
Roseate Spoonbill taken with the X-T2 and the XF100-400mm.