I have the one with circle grip and it is so much easier to manipulate than the standard handle, I highly recommend that Root Slayer for ergonomics alone but it is a BEAST on roots, Russian Olives are my nemesis and that Root Slayer brings them down faster than anything I have used.
GOOD REVIEW.... I was wondering if I should get the LONG one, or the shorter ROUND handle one????? So thanks for the advice on getting the round handle one.
I like the the shorter round handled one because you can get on top of it and get more leverage, I'm over 6 ft so when I lean into it it is really effective, the round handle allows you to get creative with your grip which is nice when in confined spaces or other odd positions. If I had to choose one it would be the circle grip.
It does a fairly good job at basic digging as well. You could easily use it to transplant a plant as long as you dig away from the roots and don't damage them during the digging process.