It's time for an updated review. Wescom CU has a lot of happy customers. The low reviews below seem to be during the 1-2 year period where all US credit unions suffered and many had to merge with others to stay alive.
Right now, Wescom is where I do all my primary banking and I wouldn't go anywhere else. The rates are good, the employees are friendly, getting ahold of customer service is fast, and the benefits are easy to understand. At my old big bank, I had account fees, but it was hard to understand what fees were applied and what perks I had, if any. Wescom has a super simple point program/membership, and they plaster information about your tier and available benefits everywhere. My account fee (I think it was $5) was quickly waived right at the start by doing simple things such as: activating your online banking access, having a debit check card, choosing electronic statements over mailed paper statements and etcetera - basic stuff most people would do anyway.
Their remote banking services are good, one of the best in the credit union world, which is why I don't mind them having less branches than big banks (though 20+ branches is still quite a lot compared to most credit unions in the SoCal area). Every banking-related task need to do is done digitally or over the phone. I especially like their smart phone app; it looks good and runs smoothly for things like depositing checks, sending money, and checking balances. Overall, I've had no problems with this credit union at all, and I'd recommend them.