The first thing that impressed me before I even got on the bike was the digital dash, looks very good and works very well. Only thing lacking is a temperature gauge, although it does have a light that comes on if the engine is overheating.
After swinging a leg over the seat I was further impressed by the riding position. This gives the rider a nice upright position and compared to my CBR125 I've just parted with, a much more dominant feel on the road.
I haven't run the engine in yet and with the cold and wet weather conditions we've had recently I haven't really tested the bike yet, in terms of handling etc. But I've covered just over 300 miles so far and the bike is very easy to handle at slow speeds manoeuvring through rush-hour traffic. I've also had someone on the back which was no issue for the bike.
As for the engine, all I can comment on at the moment is that it feels very powerful. Until the bike has been run in, I can't rev above 4,000 for first 500-600 miles and so far I haven't really needed to. Plenty of pull low down in the rev range means town riding is effortless. Duel carriageways, motorways etc. are a breeze, 4,000 revs in 6th gear is about 55mph. The bike feels very comfortable and stable at this speed and I'm guessing will be at 70mph+ aswell. On the 125 I could feel every bit of side wind and had to keep adjusting my steering and balance, the ER-6f though deals with this much better.
I can't comment on the reliability due to only owning the bike for a couple of weeks, but the quality of the finish seems very high.
Overall I'm very happy with this bike and would strongly recommend it to anyone looking for a bigger bike. Whether upgrading from a 125 or even 500, this bike will provide plenty of fun and power to entertain.