I dont like the shutter release button on the grip..or the back/front wheels...
the shutter release button takes a bit of a push to operate, and as a result you may end up taking a image. rather than just metering......the on/off slide button is also sloppy.
at the mo the pucker grip can be had for $199 at B&H...postage is a killer though at about $60...alright if you gonna buy a bit of other gear as well i suppose..
the third party cost me $54 au..to my door...look..it aint bad..just dont feel as good as the K5 does..
one thing I did get with the grip..was a cabled remote shutter release. for a grand total of $3.88 au..and that is great..works a treat and feels well made...crazy world aint it