Some repeats are immediately identifiable as not suitable for fair isle knitting due to the length of some of the floats.
Any of the PNGs in the blog can be enlarged to check on any areas with more than 5 black or white pixels side by side, the guideline for the suggested maximum.
The original width and height of design are not clues by default, issues may not be evident until after the motifs are drawn in repeat.
In wearables, a compromise can be reached by taking any of a number of measures, or even by adding lining or iron on facing (woven or stretch), depending on end use.
This 30X30 repeat plays with rotating a half shape around the full first design, forms suitably short floats, 
while this 18X24 design has several areas that merit attention. 
This design plays with paired color reversals to create secondary patterns, identifiable here as would-be six sided snowflakes, and is a clear candidate for knitting as DBJ.
Each row of double jacquard consists of two rows of slip stitch patterning, one with ground yarn, the other with contrast.
It is not only newbies that encounter problems with any technique.
There are some days that offer the opportunity for testing patience, persistence, and expletive vocabulary.
The first knitting attempt was with the ribber set to knit every stitch on every row for striper backing, using 2/10 wools. The carriages were hard to push and with some lovely holes including these, even after tension and weight adjustments. 
Troubleshooting included:
with weather changes especially, think about static, a culprit often named in situations otherwise not explainable
checked needles, they looked fine, had some sticky latches, oiled them
checked alignment, OK
discovered the ribber had dropped slightly on one side, 
raised that side to match the space between the beds on the other, and on the first next carriage pass there was this.
That safety pin was not placed for special effect or aspect ratio, it probably entered through the slots that allow the belt to rotate, but where it came from remains a mystery.
With the yarn selection changed to thinner, similar color 2/20 wools, there were no dropped stitches> holes.
The first test, with striper backing, measured 9.35X10 inches, 
and with birdseye backing, 7.75 X 6.75 inches