I had never tried ramen before coming to Ramen Tatsu, and it was a great place to try it! I've since had dinner at Monta, and don't really understand the hype over there. It was good, but Ramen Tatsu had better prices, more comfortable seating, and better ramen (though I'm clearly no ramen connoisseur).
I've tried the spicy miso and tonkatsu at Ramen Tatsu, and would recommend both! It's also really nice that you get a free drink for checking in!