We travel to the Carlsbad area on business (and pleasure) at least twice a year and have stayed at a few hotels near to the Pacific. We used to stay in La Jolla for their boutique hotels and then travel to Carlsbad.
The West Inn hotel is the best of the near the ocean hotels- by far.
The hotel is spotlessly clean, the service is very friendly and accomodating, the rooms are ample and very clean and the two restaurants next door are terrific.
The beds are comfortable and with plenty of pillows.
In the morning I generally take my run or walk a few blocks away to the ocean and watch the surfers and locals.
Access to I-5 is closeby. There is a power plant chimney next door but it was not ever operating when we visited (four times now).
I would highly recommend this hotel to business travelers, vacationers and families.