Hi
We were in the Sirena last August - 9 of us and we all have differing opinions !
It is a little bit run down but thats because it's being pulled down after this season and a new hotel built so I don't expect they will have done any refurbishment. Good location - right on the promenade and central for everything.
We were half board, the food was OK as long as you don't expect traditional englisf fare - we eat in the hotel most nights and always found something to have. A bit strange but the choices that look the least attractive usually tasted the best ! The green mash was a revalation - it had spinach in it and tasted great - just looked strange
The hotel was good for kids as they had a couple of pool tables, internet room and a large 'hall' full of couches and chairs that you could watch DVDs on the large screen. They als served Chickeb nuggets, chips and beans in the bar there.
The roof top bar has a plunge pool and is open all night. The breakfasts (to buy) in there were quite good as well. Live sport on the telly - spent many an hour watching the Ashes with a cold beer

They also showed Big Brother on request
Rooms were fine - nothing special but plenty of space.
Didn't like the pool at the hotel (acroos the promenade) so we used the one in the hotel next door. Massive pool, clean and nice food at the pool bar. You have to pay for sunbeds etc but it was worth it. Leave the hotel by main entrance (not Beach side), turn right thru the car park and go stright thru the reception/lobby of the hotel and you will see the pool. Say hello to Chris the 'pool man' if he is still there - a really nice helpfull guy. He may be working at the hermitage this year as we helped him fill out his job application form ! Nice food at the pool bar.
Ask away if you have any questions.
John