Summary: Excellent- Ergonomic, Extends battery and function, Sealed

Comment: I wasn't sure if I would use or need this but so very glad to have purchased it with new K20D. Not only does it provide a secure, convenient way to store an additional memory card and remote but automatically extends the batterly life. The additional controls and functions also make for a comfortable fit as does the entire grip...in fact, I STRONGLY prefer the grip as it just seems easier to hold and control.

For those who may be wondering - yes, the grip IS sealed just like the K20D so no need to worry about a sealed camera with unsealed grip. I don't find it excessively heavy or builky - to the contrary it feels very comfortable even with relatively small hands. I enjoy the ability to use alternative controls when shooting at different angles and VERY pleased with this purchase. EAsy to install, intuitive to use, makes it nice to carry additional accessories without fear of loss. Excellent.

Summary: Allows me to grab the camera and go

Comment: Using it with a K20D

Things I like:
- Improves grip while shooting landscape and portrait
- Holds another battery, the wireless remote and another memory card so I don't have to make room or dig around in my pockets for all that stuff
- Looks cool!

Things I don't:
- Have to take it off to change the in-camera battery
- Have to take out the in-grip battery to get to the extra memory card and remote

It worked exactly as described, is well built and Amazon two-day shipping took less than 23 hours from order to my front door.

Summary: Must have for Portrait Photography

Comment: If you do lots of portraits you need the BG2. Yes you get the added bonus of extra battery capacity and storage for the remote control F and an extra SD card too! The ON/Off/Preview switch only works when the main camera switch is on. The shutter release and other controls fit comfortably, the extra weight and size is also a plus for either larger hands or larger lenses. I'm not sure if it's worth the list price, but definitely worth the price here on Amazon.

Summary: Solid Upgrade for K10D or K20D

Comment: This batter grip is a great upgrade for the K10D or K20D at a great price.

Pros:
* Priced right
* Additional set of shutter release and control dials allows quick and easy portrait oriented shots
* Though I don't use the wireless remote, a nice touch to be able to store in the grip.
* Easily installed and removed.
* The additional weight is lower if compared to other body/battery grip combos such as Nikon.

Cons:
* I would have preferred some more rubber treatments at the back of the grip where the right thumb goes, similar to what is on the body. I'm going to end up adding something to feel the grip is secure. With the added weight and the angle of grip, I am cautious of the missing rubber treatment.
* Ergonomically, Pentax could do a better job matching the button/dial placement on the main body. The on/off/preview switch is at an awkward and different angle then it's twin on t he body. The adjustment dials are at different distances from the other controls compared to the body. I amquite used to the ergonomics of the main body after using them extensively on a K10D for almost two years, and it would have been an easier transition had the control elements been in the same locations. (Blame a wrestling injury from early childhood, but the back adjustment dial on the grip is out of reach for my mangled right thumb.)

Summary: Love it!!

Comment: Love this extra battery compartment. Came in handy with family reunion when camera battery ran out of charge. It does add a lot of weight to the camera, but is worth it!!! Like the way I can quickly change from camera battery power to battery in this compartment within seconds!!!