For the past years I am continuously editing Marikina City for roads, cycleways and footways. I believe OSM has the most "road complete" map of this City. However, I haven't really made a systematic approach or metric to say it is complete. You just have to take my word for it.
So for this year, I made a checklist of what to map and started logging all my activities in my wiki page: http://wiki.openstreetmap.org/wiki/User:Maning/Marikina
I hope in twelve months or less I can finally declare this patch as "complete" and move on to mapping (ugh!) house numbers.