"I absolutely loved this alien/war of the worlds themed coffee shop. Amazing atmosphere. they roast their own coffee so the quality is top-notch. The owner was there and was so helpful and friendly. Truly out of this world experience."

"I came here to mainly cover a review I had to do for my journalism class at Mercer County Community College . Isa the owner was the kindest and most personable person I’ve met. Very helpful with my assignment and also great to talk to. I would recommend coming here, it’s a great atmosphere and we should support local coffee houses more over the chain establishments. If you go, you must try The Alien drink, it was really good! Definitely will come back and support in the near future."

"Hands down my favorite coffee spot in the surrounding Princeton area. Cozy atmosphere, plenty of tables/space to work or chit chat. Delicious chai! Great coffee, tea selections and yummy snacks. Isa, the owner, is kind and attentive and all the baristas are lovely as well. I’m a huge advocate for supporting small businesses over conglomerates and Grover’s Mill does not disappoint!"

"WEST WINDSOR: Grover's Mill Coffee House is everything you would hope for in a local coffee shop: exceptional food and drinks, a warm, inviting atmosphere, and a unique connection to history. Just three miles from the legendary landing site in Orson Welles’ War of the Worlds broadcast in 1938, the cafe embraces its Martian roots with playful nods throughout: artwork, posters, themed merchandise, and menu items inspired by the iconic event. Leashed, friendly dogs are welcome both inside the cafe and on the outdoor patio, making it a perfect stop for pet lovers. The drink menu is impressively varied, offering everything from classic coffee, tea, and espresso to seasonal specials and frozen treats. Light fare includes egg and cheese sandwiches, croissants, bagels, and fresh pastries. One standout: the “Green Alien,” a pistachio and white mocha latte that is as delicious as it is memorable. There are doggie treats behind the counter. The staff is genuinely welcoming and clearly enjoy seeing both their regulars and their four-legged guests. As a bonus, the shop is also environmentally conscious, brewing with organic beans and incorporating sustainable practices into their daily operations. Thank you to a local we met at Van Nest Park who told us about this place."

"Looks like a very cool coffee shop with alien theme. I got the double espresso which was a little less intense to my liking but not bad. They seem to roast their beans on premise. Service was good and quick"