If you give Swish a call, they are very transparent about the process and where they are - only limited by the information, I've had conversations within DMs here and on the phone.
As for the kit supplied, neighbour opposite and myself were given Plume Pods, fantastic for the less tech-savvy users but they're not exactly flexible and upset a lot of my home network, I went out and got a new Netgear router and left the Plume unplugged, plus the Plumes have one small LED light that tells you it's status and you have no idea what means what, when's it off, it's working?!
As for going "live" it can vary, the Swish vans worked their way up the road and got to me quickly and I've been live since November in Beaconsfield.
EE 4G >> Plus Net >> Uno Fibre+.>> Sky Fibre >> VOXI 4G>>Swish Fibre Home 400 (402/410)