Can't comment on the tri tip, but I've always had good at Trader Joe's. I was in San Fransisco on business and there was one right down the street from my hotel. Not only did they have ACTUAL 2 buck chuck (it's $2.99-$3.99 a bottle here) but they had a HUGE selection of Napa Valley wines for between $5 and $8 a bottle. The same wines here would be in the $12-$20 range. They also had a great selection of micro and craft beers for about half what we'd pay here on the right coast.
We have a few in our area here and really like the selection and prices.