We traveled with our 3 kids ( 2,4,6 yrs). The apartment was sufficient for our needs of 5 people but might be too small for USA standards.
PROS: Easy access to transportation- within steps of train station. Convenient stores, grocery market, food court was located below apartment. Has community swimming pool (make sure to bring swimming caps). Plenty of local food stalls and restaurants nearby. Communication was superb via the Line app. Fairly quick to respond.
OTHER THOUGHTS: Would be nice if it had a microwave to heat food. The apartment came with basic cooking ware and 4 bowls/plates/utensil. Highly advise to get a SIM card for your phone upon arrival at the airport or go to a phone store (FarEasTone) 2 blocks from the apartment ( cost 800 TWD, about $26 USD for 5 days unlimited data). Well worth it unless you already have a world-wide data plan. Overall, I had a great experience at the Metro Apartment, I would definitely stay there again if I were to come back to Taiwan.