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For DIY/small jobs, I am very happy with my stanley Cubix. I paid about £30 and I'm not precious about it and it's been going for years. I might invest in something better for doing more involved laying out at some point, but tbh the cubix does 90% of what I need.
Spirit levels are like tape measures, in that they require way more attention to use properly than people realise, and there is a skill to using them accurately.
Whilst we're here, what is the recommended laser level?