Not long after I started out with funds at the time in short supply I paid £15 for the one pictured, the price included the test indicator. Thinking if it was half decent I could get by with it until I could afford better, well I have probably been lucky but I cant fault it. The big surprise is how good the test indicator is, I tested it against my more expensive dial gauge and it is good throughout its range. It has no stickiness, very smooth and always returns to exactly the same position which cant be a bad sign.
The magnetic base is fine with a good pull on the magnets and the central locking is good and secure and the swivel joints look to be well made with nothing feeling fragile about them. So if it continues to perform as it is then I dont feel the need to spend a lot more on something that wont offer anything more.
As mentioned I was probably lucky in getting a really good one.