I always find it a bit strange that people will buy test kit by brand name rather than what it will actually do and it appears that some brands products are considered inferior to that of well known brands even though in some cases their products are better spec'd
Back in my days at college quite a bit of time was spent on choosing test equipment and analysing the specifications of test meters, ok the MFT was something on the horizon and testing if any was done was a lot more basic than it is now but the college lessons gave a good insight into making a reasoned choice and understanding what you are buying
When you look at the history of test equipment Megger can trace it's history back around 130 years while Fluke have been around for 70 years while Metrel go back around 65 years although they only setup Metrel UK back in 2005 their test kit was sold in the UK under the Alphatek brand name for many years before that so they are not that new to the UK and the test equipment industry, so I suppose some peoples choice may just be down to the history of a brand and / or how long they have been around
All my multimeters are Fluke apart from the old stalwart the Avo 8 the Fluke multimeters are hard to beat my Fluke 27 has been in regular use for 40 years now while my MFT choice for the last 25 years has been Metrel, a couple of years back I retired my 61557 Eurotest and updated to the MI3152 which took a bit of learning to get the best out of it but I'm up to speed with it now and find it easy to use and the ability to save and download the test results provides a good audit trail of the testing that was carried out if ever needed, I would certainly not hesitate to recommend Metrel my 25 year old MFT was refurbed a couple of years ago and is still useable as a backup to my 3152 if ever needed it also does some tests the 3152 doesn't do