"It works well and it certainly isnt hard to twist. the numbering is a bit difficult to read but atleast it clicks. Work well too, fitted on 40 radiators in the house. It is plasticky but what do you expect for a tenner? Especially considering that a chrome trv for the same price would cost double the money elsewhere."
"This is a poor product. The top is almost too tight to turn and the numbering can hardly be read. I only fitted the 2 I bought because I had no alternative. Fitting is straightforward, and it seems to operate OK."