An HDMI cable which is very cheap will give you the same picture as the most expensive one so a review must focus on build quality. It works. Heads are small and fit well into the slots if they are very tightly placed (Panasonic tv's) Have not had any issues with reliability but I don't use it for anything other that connecting the Freesat box to the tv.
Nice kit which is amusing to use (remember childrens chemistry sets?). Could do with a couple of more tests, phosphates ect. Also could incude two more test tubes and a small holder for the tubes when conducting the tests but these are small criticisms. All in all a good buy.