I took my old Specialised mountain bike in last week as I got a puncture on the way into work on Wednesday AM. They insisted I buy a new tyre as well as an inner tube - £29 in total.
I paid this, but the tyre went flat by Saturday AM, and the chain was making a lot of noise.
I took it back, they said they'd look at it - returned on Sunday and they said it was all better, although on the way to work today (Monday) the cogs were still slipping really badly. Having inspected it myself I discovered that they'd simply not bothered to slot the wheel back into the quick release mechanism.
Poor service & shoddy workmanship. That was my first trip to Sydney Street bikes, I shan't be going back.