Considering you can get a three pack of the normal sized AC2600 ones for £136 I think unless you desperately need the echo dot I would personally go for this other option instead... https://www.hotukdeals.com/deals/bt-whole-home-wi-fi-system-3-discs-13599-wcode-at-robert-dyas-free-cc-3294296 But it all depends on your setup and usage. I bought a two pack of the AC2600 ones after previously using WiFi power extenders. It's been a game changer for me. The BT units are very fast to set up and have been completely stable so far. I live in an apartment building with very thick walls. But, these are offering speeds very close to what I can get via a wired in connection. Totally recommend them.
The Mini is AC1200 compared to the original which is AC2600, but it does benefit from having a dual-band concurrent backhaul. Which means it can use both 2.4GHz and 5GHz at the same time, which will allow the discs to spread the traffic over the 2 bands. The App does have a smaller set of features at the moment. There is only a “Pause All”, and no access controls (timed schedules etc) at the moment. It does have a Guest network and you can turn off LEDs on the discs.
Basically it's telling you that the more people using the wifi at the same time, the bigger setup you need. Especially if you have multiple users, someone playing online games, teenagers watching streaming movies, others wanting to browse, video chat, etc. If you just want access in every room for light use, or maybe streaming music, then the mini is probably adequate.
I have seen this but i cannot tell much from it
Trying to find out the difference between these mini discs and the normal sized discs. Anyone have a plain English answer?