Quickscale’s drawing take-off and data collation and export functions make it the most competitive solution I’ve found.
The options to switch view elements on and off and colour up your work as you go means uncluttered working (and nothing you’ve done is lost!).
We used the Month-Trial to see and used all the features and it wasn’t long before we were investing the small amount necessary to take this on full time.
The USB version is worth its weight because your software is upgraded for life and insured against damage or fault.