GGG- gardening with back issues.
GGG, I got the no name kneeler at Tues Morning for $20, beats $40 from Gardeners supply. Haven't used much for sitting, but okay for most kneeling tasks, great around certain beds that that are higher or sloped, even the bed by the road to the curb. It was great for getting down to cut back some of the knock outs, and deadheading, weeding. Not so much for small tool digging, it may be better for you. I learned right away how to and not to get dwn and up. Wish I could show you, I use any sturdy tool, cane, big pot, chair, etc. even the shower chair if I drop the soap. With the support on one side and the other leg, with the knee and hip at right angles. I am able to push off, with the same hand on that leg, pushing up with the opposite foot. I could show you on skype, you can practice using a small stool with a pillow on top, sort of like a lunge. If any of that makes any sense.
Of course, when you are using the kneeler to get up an down, make sure it is firmly planted and or level. I toppled over backward when getting down on a sloped path. I am doing okay, but have circumvented the official PT for gardening activities. Bad, bad, bad, I know. But I am the only gardener, andw there is a whole lot of garden to take care of. I have to figure out what I can let go of, and what I can hire or barter to be done.