I've just ordered one actually as realised my 3S is still under retailer warranty so filed an RMA and they offered a refund. the left and right buttons are dodgy after a year, sometimes have to double press MB2 and sometimes MB1 double clicks.
So £80 being refunded and the MX4 is £119, making the total end cost of MX4 for me £39.
That will be fine.
This was with Amazon and warranty was the usual year retailer thing, although Amazon being Amazon, they tend to be fine if it goes over anyway.
You could request the software to see if your workplace will allow it perhaps? It is a Bolt device so is secure enough for business use, maybe play that card to them?
Can be had for £83.99 if you search on a popular UK deals site, it did include a free carry case but they have sold out of those.Holding out ion the faint hope that Amazon does something in the upcoming Prime Day. Unlikely for something so new but it's worth waiting to see.