Obviously. But presumably if you have a problem they'd probably replace it with another OpenReach one and charge their standard £150 or whatever callout fee for it. Low risk / high cost / pays your money etc. :)
BG Nexus are good quality and this price is good. I've used a load of the USB sockets in the last few years too. As someone else said LAP are not good quality and none of their products last long. Cheap electrical components are false economy. MK are great stuff and hence why their vintage stuff still works and are expensive to buy used if doing a vintage restoration... Yes brown bakelite sockets and switches are £££s
BG are great value. Don't have many problems with thier products. LAP are generally poor quality and to be avoided. MK used to be a real cut above in quality terms but are now overpriced for the quality. Although I do like their grid switch range of accessories. Schneider do DBs and associated switchgear. News to me.
Easy to do though... Its not like it's mains voltage. Have at it, if it goes wrong, tell them the kids damaged it. ;)