Hi
When I said Fibre I meant real fibre ... a fibre leased line (i.e. BT WEES or other leased line equivalent) these run at 100Mbps, 1000Gbps (1Gbit) or even 10Gbit+ and provide a high capacity backhaul to the internet (a location where you can get peering/transit etc). This is how a Fixed Wireless ISP would (should) get a high capacity connection for it's masts.
I did not mean what most people wrongly call fibre, i.e. a FTTC (BT Infinity) connection where it is just fibre to the cabinet then copper the last mile.
If you're in an area that is not going to get BT infinity (or similar) then Fixed Wireless is your best bet.
I'm guessing as you're looking at Briskona you are in Ireland, is that right?
Best thing to do is give them a call and ask what ping times are likely to be. They should ask you for your address so they can give a reasonable estimate (by looking at an existing customer nearby).
I was also looking at plug in network extenders, but these seem to get mixed results and I don`t know if this would help.
I'm confused, it seems like you are mixing things up. If you have a rubbish internet connection then a wireless extender will do nothing for you as it won't improve the connection itself.
Do you know what speed you currently get? If not you can test at speedtest.net best to do this with an Ethernet connection to your router (with a PC not a phone or iPad).