IMHO I think the seawards and compterised pat testers are rubbish.
I had 4 guys on a job with the manual pat testers (easypat 2100 by martindale) and their guy was working with us too with a seaward... By the time He gad done one desk, we had done 3-4 desks.
You have to know your readings and work out whether it's a pass fail yourself tho, and record the results manually.
I've had auto pat tester. In the past and recognise 2 major problems right off:
u test an appliance and it fails: item 086 = fail
u repair and retest it to pass: it's now item 087
so u have a double record entry for 1 device on the paper work.
Another problem is that if you test a 4 gang extension with built in surge protection you will get something like a 0.5MOhm insulation and it's a fail, when actually it's a false Reading and it should actually pass.
Suppose it depends on how much you detest doing paperwork by hand and then retyping it at the end of the job...
A major pain when u have 4000 tests on a job!!