Choose your answer: is the following review positive or negative?

Unfortunately, they do not accept American Express and this is my card of choice! Dissappointing....especially when I had a guest with me and I was suppose to pick up the tab....then to find out they do not accept the card. My guest and I had to scrape together cash. Ugh. Also, 2 other comments.....the wait staff was 'standing around alot when tables were in need of cleaning---and the boss was in the restaurant! Second, their street tacos were hard as a rock. Not sure if they are using stale tortillas or they nuke them and let them sit til the contents are ready---so by the time it is served the shell is very very tough.

Pick from:
(a). negative;
(b). positive;
(a).