Radiator thermostats - buy cheap or buy expensive

[Willbeforced]

I'm about to buy 10 Pegler Terrier Ii Trv radiator thermostats from Screwfix.com. Can anyone recommend anything better or cheaper or are they all pretty much the same as far as quality goes.

Would £4 thermostats from b&q suffice or is it, you get what you pay for?

Thanks

 

[weargas]

my opinion is you get what you pay for but on the other side of the coin if your system is dosed with inhibitor you shouldn't get sticky trvs even if they are cheapo ones.