I was so fed up with getting one or no bars and not receiving text messages other than iMessage and calls cutting out (yes I know wifi calling can help but does it always?!) so I decided to look for a solution. Now the very kind and helpful people on the chat (Mia, Hellen, and Kate) were excellent to answer all questions and organised a delivery that took a few days (ordered Tuesday arrived Friday). It arrived and the only thing I would say is that there is a lot of equipment and the internal antenna is bigger than it appears in the picture - think spread out large hand and that is about the size. However my 0/1 bar has turned into 4/3 bars and all works perfectly.
I must point out the following:
1. The setup is a little tricky and you need to RTFM, which by the way comes on a circular thing apparently called a CD - remember those?! Read this carefully and follow and all will work perfectly.
2. Test the system roughly in the position of the house where you would ideally like the things then test your phone's signal. Then install the fittings. I went for the external antenna in the loft pointing to the mast, internal in the hall in a central location, and voila - all done.
So to summerise, ignore the super negative reviews here - maybe during this very tricky situation they had issues with supply but who hasn't? They are not based in China but sure they get their equipment from there like most companies now! Finally, it is pricy but that is a small cost to get perfect mobile phone reception in the house for all that enter not just those are on the wifi within.