McGill's 757 used to be horrendous from Paisley to Clydebank. Scheduled to take an hour but circa 2013 the Caetano Darts had repeated breakdowns on route. Passengers were forced to wait 30 minutes for the next full length. Giving 90 minute end to end instead of 60. Luckily one morning a Caetano managed to limpalong from Inchinnan Business Park to the depot just as Wee Andy was running light in a Bluebird to Clydebank area, so Clydebank passengers were ferried direct to Clydebank on this via Red Smiddy and A726 whilst intermediate Erskine pax either waited on a replacement 757 or used a 22/23/A/X
I've only used that 757 a couple of times tbh. When it was the old 22C that done Paisley to Clydebank though I used that for college and it was terrible. Always about 20mins late either way