Glad you're enjoying your discovery but it's hard to find any appreciation here for non-Canon, oddball, mirrorless cameras.
But you're right, the K-01 is an astoundingly good imaging machine for a really low clearance price. I like it so much I bought 2 at that deal earlier this year. Terrific for studio shooting and still-life type work.
I find the display a bit too useless in sunlight, and AF can be indecisive with some lenses.
But you can't beat the image quality from this brick with any Canon cropper!
K-01 has great Hi ISO ability and is also top-teir in low ISO dynamic range and devoid of pattern noise. IBIS works great too, nearly 4 stops worth here.
I used it the other night to capture some handheld shots, indoors, in very low incandescent light. I was on the floor, watching some TV, when my lady's new red shoes caught my eye. They made a nice focal point amidst the other colors and textures when she dropped everything right there. Old 18-55mm kit lens.
Light was one frosted 40W tungsten bulb about 15 feet away. Shot was still underexposed so pushed jpg a bit.
OOC jpeg, EXIF below:
Color Space: sRGB
Custom Rendered: Normal process
Date Time Digitized: 2013:11:09 21:32:57
Date Time Original: 2013:11:09 21:32:57
Exif Version: 2.3
Exposure Bias Value: 0.3
Exposure Mode: Manual exposure
Exposure Program: Aperture priority
Exposure Time: 1 / 5
Flash: Flash did not fire, compulsory flash mode
FlashPix Version: 1.0
Focal Length: 35
Focal Length In 35mm Film: 52
ISO Speed Ratings: 6400
Metering Mode: Pattern
Pixel X Dimension: 900
Pixel Y Dimension: 596
Scene Capture Type: Standard
Sensing Method: One-chip color area sensor
Subject Distance Range: Macro
White Balance: Manual white balance