I didn't stay in Miri for very long and made my way in and out without staying a night.
I did look at some Miri accommodation and it was quite expensive compared to other places I had been.
Miri is expensive because of the oil industry having a foothold here and the Brunei people who come over for some cheap shopping.
Miri is meant to have more of a lively nightlife and some seedy areas.
Miri makes a good gateway to destinations such as the Niah Caves and the Mulu National Park.
There is a bus available from the Miri airport, but it seems rather unreliable. Coupon's for a taxi into Miri town from the airport are 18.50 RM.
I looked at some accommodation in the 25-35 RM range and it wasn't very clean or nice. Other travellers did recommend, "The Highlands" which is run by a New Zealand man and his wife from the Kelabit highlands. I think a dorm room was 25 RM. The Highlands is located down by the waterfront.