The new Fiesta's are awesome tbh! I don't think you'd miss a 306 driving one... 
As for how long I've been without one, well June 2011 - Septemeber 2012 I had 2 Golfs, an Avensis, a 106 and briefly a Vectra B between 306s. Then March 2013 to Feb 2014 I had the Vectra C. Can't say I missed 306s in between though lol.

As for how long I've been without one, well June 2011 - Septemeber 2012 I had 2 Golfs, an Avensis, a 106 and briefly a Vectra B between 306s. Then March 2013 to Feb 2014 I had the Vectra C. Can't say I missed 306s in between though lol.