Had a free bike 'health check' done. I knew I needed a new cassette and chain, they told me I needed a new bottom bracket and brake pads too. Quoted £150 to do it all??! No way! I get that they obviously need to make money from this but that is extortionate! Rough estimate.. the cassette is £25, bottom bracket £10, brake pads.. front and back wouldn't cost more than £10. Took it to a family friend for a second opinion.. Halfords were wrong about the bottom bracket, we bought the same quality parts cheaper elsewhere and put new gear and brake cables on it too Halfords hadn't noticed they had rusted, striped the wheel hubs cleaned the bearings, adjusted the gears... Striped the headset.. the whole lot was looked at and cleaned. £35 it all cost in the end.. so.. Halfords.. would that have been £115 in labor costs??! It's convenient having a business do the work for you.. not everyone knows how to maintain and repair bikes and not everyone has the time or interest to learn, but you should be able to trust the business. I don't trust Halfords anymore, I'm glad I got a second opinion, I will never be paying Halfords to do work on any of my bikes in future and I will discouraged others from doing so aswell.