My partner has that exact topstone, or maybe an earlier year, but same spec and it's been absolutely fine for over a year now. Never had to adjust the gears once and they're still very smooth.
Did change the brakes though as the promax ones are shite.
I will at some point change the shifters over to the Sword ones as they look nicer and don't have the sideways cable.
There is absolutely nothing wrong with Advent X.
My partner has that exact topstone, or maybe an earlier year, but same spec and it's been absolutely fine for over a year now. Never had to adjust the gears once and they're still very smooth.
Did change the brakes though as the promax ones are shite.
I will at some point change the shifters over to the Sword ones as they look nicer and don't have the sideways cable.