Well, I got my DrillTill this week. Tried to dig a hole (as advertised) to plant two cannas and it would not penetrate more than 1/4" in our hard, dry, clay-ridden, limestone rock-filled soil in Central TX. The drill I used was fully charged (cordless battery drill) but it was still a no go to dig a 3-4" hole to plant the rhizomes, so I just switched to a shovel.
I haven't tried the other two attachments yet, but am doubtful the tilling tool or weed remover would penetrate any deeper into our very hard Blackland Prairie soil. Sigh....another tool let down. I do, however, think it will be VERY useful down at our cabin place to plant, till and dig holes in my new raised garden beds and in the yard as we have very sandy soil down there. It will help a bit with my back disc disease issues.
In my case, then, it's not a total waste of $19.95........but if you have very hard, dry, compacted soil, this is probably not the tool for the job. I will use our electric drill with it one time to see if more power will make a difference, but am not optimistic on that score. Usually only a long spade or sharp-shooter shovel will penetrate the hard soil where I live, so in the city, that's what I'll be sticking to.