This is the second Sun Joe tiller/cultivator I've owned. The first lasted for several years tilling in hard soil and rocks. After one season with the second, it appears to be as reliable and does a wonderful job. I have multiple raised beds and I can control it perfectly. The electric motor provides plenty of quiet power and has never bogged down. I highly recommend!
Compared to my older Mantis gas tiller, this is a monster. It starts so easily (the main reason I dropped the gas tiller), and is VERY powerful. If you can reach a cord to where you need to till, this is the answer.
I found out that while tilling the soil pulling the tiller back wards helps the tiller to dig out the large weeds and break up hard soil. Going forward the tiller will try to walk over a hard surface full of weeds. The tiller is easy to control and light enough to be carried where you need to go with the tiller.
I switched from a gas powered tiller to electric and I was skeptical about it being powerful enough for the job. Pleasantly surprised. One of the few times I did something right. Highly recommended.