Anyone use one of these ? : http://www.starlane.com/
Depends what you want to use it for. (Especially as according to that website there is no UK distributor)
For racing there are plenty of options that are tried and tested in the UK, and that match up to the circuit timing kit without relying on GPS.
For trackdays they aren’t allowed and if you use one expect to get sent home.
There is a few bike places online in the UK that sell them , it’s for karting , there expensive compared to the magnetic sensor Alfano & Michron units but then you get the advantage of real time speed , live sector times and recorded track data with the GPS .
i have a mate that uses the Starlane Stealth with his porsche GT3 RS, he’s quite happy with the starlane, works flawlessly, better than an alfano, no need to hardwire a sensor
my 2c