When it comes down to a particular model and you're unsure of any problems you may have read about....ask here again as many have been fixed in latest FW editions and this alone makes many reviews obsolete.
Most of reviews are:
1. Mostly obsolete because FW changes.
2. More or less obsolete Because HW changed.
3. Because reviewer have more or less lack of knowledge, experience and skills about just this equipment and how to use it.
4. Because reviewer may have more or less lack of knowledge, experience and skills how to make reliable lab testings.
5. Because bias. Bias do not come only from money relationship. Just one brand owner may be very biased. Just like peoples are when they fall in love and see only nice things and blind for every error. Or people may have some bad feel with some brand - in history - and after then he do not see nothing but errors and good things he close eyes and ears and brain. Some seller may be very biased and some seller less. Some sellers may be much much less biased than some people who have fall in love with some brand. Also some peoples are more honest than other.
6. Reviews what are designed to push down some brand - perhaps more common than peoples often think. This is because if you promote some equipment and tell how good it is in this and that and do some tricks every people suspect bias - even if it is true.
But, do it opposite way, support negative opinions about competitors without easy detectable relationship. Drama theater is not very difficult sport.
Perhaps it is very fun result if we arrange blind tests or even double blind tests.
But simply, think what hapend if we remove all things what tell brand. Change all GUI so that no names and same colors and overall edit display so that direct recognize brand is difficult. All scopes to box what are same, including knobs and buttons so that recognize is difficult or even impossible.
After then give these Keysight, Tektronix, LeCroy, Rigol, Siglent, Goodwill, etc (some comparable level models) etc to test group what are asked to do some designed measurements and tests. Then randomly selected test groups and randomized also equipments and so that other test groups can not get any info from other group. After all groups have made tests collect data and opinions...
Some reviews are just some kind of ranting and playing like kid with his first game boy. Most bad are these "out from box" noob's made "reviews" where they do not understand even most basic fundamentals and then "wondering" things what they see and suspect that scope is bad more than think that they do not understand what they see and why. You can see these user errors and lack of knowledge even from popular reviewers what noobs admire and think they are popular because they know so much. It is easy to know much and stay front of "class room" if classroom is full of noobs who are just starting hobby and perhaps just play with his first oscilloscope.
Mostly these, sometimes even very popular reviewers, very rare do and show any carefully designed and done lab grade test measurements. After look what kind of user mistakes they do even with simplest basic things some times, it is easy to understand why they do not show reliable tests with true professional grade measurements with well designed and documented test settings and after then well documented data.
Some times they use equipment with fast fingers what are 10 times more fast than thinking behind fingers.
Some times there is available real professionals made reviews but they are rare. Many times peoples think they are boring. Because they do not play scope just like game boy where fastest finger win.
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