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I have never found a huge difference for diy jobs, I currently use a 6ft long one which is magnetic, which is handy for me, as I do stuff with metal, but pointless if you are mainly dealing with wood, and has the added bonus of often losing it as I have left it stuck to a metal beam somewhere. You can get fancy digital ones, to calculate drops, but I tend to do this with a laser level rather than a spirit. Other thing to look out for is does it have an easy way to hold. But all in all I suspect the lidl ones will be fine for DIY use.
Spirit levels ? Are they all of the same muchness. Lidl have a set of three going I was thinking to keep in the cupboard. I have a small 40cm Stanley* one already need something longer really
Edit: stabila not Stanley