Metrel are a pain of repetition with regards to pressing buttons. Plus they possibly have the worst test leads ever to have existed.
Fluke are better than they were, but the display is a little dull. Plus selecting between Ze, PEFC and PSCC is a bit of a pain for a learner.
Kewtech individual bricks are very good and will last an age, however they are a little basic. Kewtech multifunction testers have a good screen and are clear, however there have been occasional software issues. (Kewtech are my personal fav)
Megger are hard to fault. Their leads are easy to identify and the tester being able to to measure Ze with 2 leads is a plus. The self start continuity test is very useful indeed, as well as the self test for live tests. My mft1552 was nearly killed last week, so I am about to find out how their customer services is.