4G signal booster

[Carnmore]

Has anyone got any experience of a 4G signal booster? The coverage in my house (4G 3 network) is weak and it's going to be my only source of broadband. I'm looking at either

https://www.ebay.ie/itm/4G-LTE-800M...815805?hash=item58fdd6827d:g:drcAAOSwLGtZqQcD

or