We stayed 7 nights in this hotel. We received a room that was comparable to a small appartment for approximately 100 € /night. The hotel and room is very claen. The restaurant was very good (25€ for a menu of the day), the breakfast was ok. The swimming pool was open from 9:00 to 17:00, for us closed a bit early, we like a swim after a busy day.
The only "downside" of the hotel is the suroundings, a poor town. But after a few days you get used to it. Parking is in the park. Train is neirby, easy for trips to napoli, sorrento, pompei, oplontis, ...
Herculanium is near by (500m)
If you rent a car in this neigbourhood (surroundings Naples), take a full insurance!!!! (not for the hotel but for the Vespa's)

Not that they didn't try, not that the room wasn't OK and not that the new pool wasn't wonderful in the heat but... The front desk had more important things to do than working that day, the room was on an unused wing that needed a real scrubbing and the new pool wasn't open after 7pm and the 'features' didn't work.
The place needs some simple maintenance and with that will come the business to motivate the staff. It is in a down at the heels area but is a short walk to the incredible ruins of Ercolano.
If I was going back to Ercolano I would stay here again but expect less.

Others have commented and argued about Ercolano in the comments below. I agree it is a pit. BUT the Hotel Miglio D'Oro is a gem. I could not believe that we were only paying 99 Euro for what we got. The room was immense with 3 views (Vesuvius, street, and Mediterranean) and balcony. Hotel staff was incredibly friendly and helpful. Bellboy service upon arrival. Pool was fantastic (towels provided, no charge) Grounds were impeccable. Dinner was worth the 25 euro per person plus wine. Room service breakfast was a nice touch. (5 euro per person surcharge) Private parking made us feel very secure. Herculaneum ruins are steps away, Pompeii is further and the drive is convoluted, but the Miglio D'Oro is well situated for a 3-4 day stay in the area. Only drawback; there is not much else within walking. There's a bar/cafe about 2 blocks away and a pizza place at the ruins, but we honestly didn't want to leave the hotel it was that fantastic. Oh, and it was the most complex shower set up I have ever experienced in a hotel. Highly recommended. We'll be back.

Read enough reviews about Ercolano and you will soon realise that it isn't the best town to stay in. However, for the independent traveller looking to do Herculaneum, Vesuvius & Pompeii the location is ideal. The hotel is a very short walk away from the first one and the railway station is only a 10 minute walk away.
The hotel is well appointed, the service spot on and once you step through the doors you know you’ve picked the correct place to stay in town.
Breakfast was fine, don’t expect an English type breakfast. We didn’t eat at the hotel (just grabbed a pizza in town) however, I suspect that the restaurant is probably one of the better ones in town (we didn’t see much when we walked around)
The gardens are as good as the reviews suggest and are a lovely place to relax.
I would recommend you stay in Ercolano. Stick to the main streets and even at night it’s fine. And if you are staying in Ercolano this IS the hotel to stay in.