Standard grips, saddle and tyres are pretty awful on the Boardman’s as stock (but that’s very personal, you may get on with them all). But other than that they’re great bikes. New grips, saddle and some tyres isn’t a massive expense, so if you’re looking to spend any more… I wouldn’t, I’d save it up…
Or spend it on going riding, a skills course with Jedi, better cycling clothing.
Buying new shiny can be nice, but it’s not always worth it. Though personally, I need a saddle I can sit on for a few hours at least, grips that don’t leave my hands numb, and tyres I know aren’t trying to kill me… The rest I’ll muddle through with.