Anyone from San Diego here? Hotel question

I see a list of hotels on SolidWorks website but I also found some cheaper hotels on Expedia.

Comfort Inn Gaslamp Convention Center

\$139.00
Hard Rock Hotel San Diego

\$167.00
San Diego Marriott Gaslamp Quarter

\$169.00


These seem to be very close to the convention center.  Does anyone have experience with these or know any other low-cost hotels in walking distance to the convention center?

Thanks.

SolidworksSolidworks World 2012 And The Top Ten List