I have one of the old 2 stroke ones that I bought off one of the old guys on a neighbouring allotment. I wish I hadn't - it's not much good on heavy soil.
I use it for potato planting as it can draw a trench out reasonably well. I thought I would be able to use it between fruit bushes where my big rotovator won't go, and to 'hoe' between rows.
If you have a medium plot on light land, it would probably be OK.