I just booked tickets to Bulgaria for a June wedding, and back with 10 days in Vienne, and I booked the travel insurance based on your previous posts! Actually, while I was booking I searched back on the travel boards for the company you recommended and we ended up getting our insurance thru TravelGuard (which I think you recommend).
We have about 5 days in Bulgaria, which include time st the resort for the wedding we're attending, and then about 9 days in Vienna etc. we are planning to rent a car and do Budapest (hungary, which I am so exited about!!!), Bratislava (Slovakia), and then Croatia and Slovenia. I want to see northern Romania (Timisoara) but since we were in southern/central Romania (bucharest and brasov) last year it's not top on our list. I think for the two of us, travel insurance was about 117$, which seems like a good deal. Any special things you think I should be aware of? Thanks for the wise words.