Yes you should try the beer, and take a brewery tour if you can.
I'm a dedicated ale drinking, CAMRA member, and all micro breweries should be supported where ever they happen to be.
It was like a breath of cooling air over your shoulders on a hot and sticky night on Manthos' terrace when they came onto the drinking scene in Corfu.
As for styles, they're pretty good and do make for a good alternative to Mythos, Amstel, etc. etc. My only wish would be that they should make a really hoppy style IPA, with a strong Citrus flavour, which makes for a great summer ale, which even diehard lager drinkers would be drawn to.
Overall though, when I see The Royal Ionian beers available I'll go for them over the mass produced stuff.