Indeed, I took the Piraeus-Larnaca ferry in August, with the return in September. It's an old Japanese ferry that's been tarted up a bit, but still quite basic. I had a single cabin, which was just long enough to accommodate my 6'-2" frame. It had a wash basin and aircon, so quite adequate for the one/two nights spent aboard.
I wanted to go in September, and return in October, but the last ferry back to Greece sailed on 30th August, so I didn't have much choice. After the first year, they said they were going to extend the sailing periods, but that didn't happen, in fact, this season was shorter than the year before.
Overall, though, not a bad ferry.. they strapped down the bikes really well, without ruining the seat, there is a cafe/bar a restaurant, toilets and showers. All you need, really.. and I thought £230 return, with a bike, was pretty good value (certainly, compared to UK-Spain ferries).
Anything else you want to know, just shout up.
Yes, I'm on the mend, one month on from my accident in Albania.. I can stand on one leg, with the aid of a zimmer frame, and hodge forward about 3" at a time. One day, I'll be strong enough to get as far as the toilet