The only similarity to the original boat noodles from Bangkok is the size of the portions. Taste wise, the beef Pathumtani noodles, the tom yum noodles and Ayutthaya noodles are very different from what you get in Bangkok.
Their milk teas, both the original and the green version, taste a little too much like bubble tea, especially if you order the less sweet version. Mango sticky rice was served with very ripe very fibrous mango and the coconut milk sauce states like it came from a Tetra Pak.
The fried chicken skin was a tad too salty but otherwise acceptable for its crispy bite. Crab meat omelette rice was served with a very flat omelette with a few chucks of crab meat. None too impressive.
Overall, if you want a quick meal, sure. Do not come with expectations of authentic Thai Boat Noodles.