Marianna is clean, spacious, has friendly staff. The studio is lovely, 2 single beds pusjed together. The bathroom is adequate, however it needs some creativity to use the shower curtain - but with a sense of humour and some Bob the Builder-skills, it works quite fine!
Our room was always cleaned well, and our bedding/towels changed twice a week.
A/C is not included in the price - costs Euro 8 / day. Tourism tax is also not included and is Euro 2/ day, which needs to be paid up front in cash upon arrival.
Our room had a fridge - great to stock up on cold water!
The cocktails at Marianna, by the way, are the cheapest in Tigaki!
There's a nice pool, however, many people reserve their sunbeds already at 8AM!!!
Breakfast is not included, but we walked to "The Kitchen" 5 minutes away, and had a great buffet breakfast for Euro 6.-/pers every day. Marianna is about 1km uphill from the beach/ tavernas. We hired bicycles the entire time, and were up and down to the beach and shops in no time - it might be quite far to walk every day, also in the heat!
There is a very big supermarket, Konstantinos, literally 200m up the road, where you can buy anything/everything you need for your stay.
Would recommend staying at Marianna - just know that it is not a 5* hotel, but comfortable and has all you need for a lovely Greek break.