Went to Spark SF and wanted to try the ramen (only open on Saturdays). I have to say that I enjoyed it.
I ordered the tonkatsu ramen with beef shoulder (other option was pork belly). Noodles were not overly hard. It was a bit spicy (and I did order mild), but I didn’t mind.
Update (10/6/18): I order the Yaki-Soba. It was a bit too salty for me (but didn’t hate it). I’ll stick to ordering ramen at this place in the future.