To clarify, my suggestion was that many of the problems with cheap bikes are in the dodgy build quality, not the parts (certainly in B'Twin's case, the parts are often half-decent). So, buy a cheap bike cheaply online and pay your LBS's experienced, dedicated mechanics to build the boxed bike for you. If you've bought a real shitter, the 1-2 hours' labour will be wasted money and better put towards a better quality bike, but if you've bought a decent machine let down by dodgy assembly then it's a real bargain. Source: 4 years mechanicking at independent LBS. Summary: B'Twin - great but make sure the bolts are tight before mad skidz.
To clarify, my suggestion was that many of the problems with cheap bikes are in the dodgy build quality, not the parts (certainly in B'Twin's case, the parts are often half-decent). So, buy a cheap bike cheaply online and pay your LBS's experienced, dedicated mechanics to build the boxed bike for you. If you've bought a real shitter, the 1-2 hours' labour will be wasted money and better put towards a better quality bike, but if you've bought a decent machine let down by dodgy assembly then it's a real bargain. Source: 4 years mechanicking at independent LBS. Summary: B'Twin - great but make sure the bolts are tight before mad skidz.