Thermostatic bath/shower mixer - an experience of these models?

[chainsaw_masochist]

I would like to obtain one of these deck-mounted mixers below. Does anyone have any advice as to whether there is much difference in quality between them given that they cover quite a range of prices? I guess the more expensive the model the more the internals are made from brass rather than plastic? Also how do these manufacturers rate in terms of service once the item is out of warranty?

Thanks in advance for any assistance.

https://www.screwfix.com/p/mira-atom-deck-mounted-thermostatic-bath-shower-mixer/598jp

https://www.amazon.co.uk/Aqualisa-MD100BSM-Chrome-Midas-Shower/dp/B00B9J1LN6

https://www.amazon.co.uk/Bristan-AS...shower+mixer+taps+deck+mounted,aps,99&sr=8-15

 

[HERTS P&D]

I would suggest you go for the first one, comes with a 5 year Guarantee. I took something back to Screwfix this week with only 4 days left on the guarantee and they refund me straight away.

Andy