A remap would take my B class to around 235bhp which is appealing but the stories you read (not just here) and the insurance hike is putting me off. It just seems more hassle than its worth for a few extra Gs.
The "fun factor" will be worth it for you as you will have a smile on your face with the additional torque/power and flat spots removed...
The W203 drives like a completely different car now with the Viezu remap on.
We are looking to get another car now which will either be the W221 S Class or CLS in CDI form unless I get an AMG version and I know I will end up getting them remapped too as there will be alot of additional torque/power gained.