Quantum Coffee Roasters

Featured reviews

• N

  Naseeha Rahman

  ·1 month ago

  “Staff was super friendly, and there coffee was really fresh and one of the best I've had, will definitely visit here again!! 💕”

• B

  Bianca Escandón Reyes

  ·2 months ago

  “Perfect place to go with your family, friends or alone. Amazing and fast service. Kind staff and amazing drinks as well as food. Have been here various times and love it. Would definitely recommend.”

• C

  Cymru

  ·5 months ago

  “Goat-Herding Service and Table Glue: A Proper Bay Disaster I popped in here for a brew, expecting a bit of Cardiff Bay class, but I honestly think I’ve had a warmer welcome from a rainy Tuesday in Merthyr. The two on duty were a proper pair of silent drags. I’ve seen more life in a stuffed dragon at a gift shop. There were only six people in the place, but you’d swear they were managing the crowds at the Principality on a match day the way they were acting. I stood where any normal human waits for a coffee, only for the man behind the counter who clearly went to the "School of Zero Empathy"—to tell me to go sit down and he’d call me. When the order was ready, he didn't just call it; he let out a shout of "ONE TEA AND CAPPUCCINO!" like he was herding goats up up the Garth. I nearly jumped out of my skin. Then came the interrogation. He asked if I wanted milk with my tea like it was a rare Welsh gold nugget he was handing over. We’re in Wales, mun! If you serve tea without milk here, you’re basically committing a national offence. To top it off, the tables were so sticky I nearly became a permanent fixture of the furniture. I’d have asked them to wipe it, but I didn't want to interrupt their busy schedule of doing absolutely nothing. As for a bid farewell on the way out? You’ve got to be joking. I’ve had more chat out of a Cardiff bus stop. Fair play, the coffee was alright, but the service was about as useful as a solar-powered torch in a coal mine. Lush decor, shame about the attitude. Verdict: If you want to be barked at while sitting at a sticky table, this is the spot for you. Otherwise, keep walking!”

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• S

  Steph

  ·1 year ago

  “Fantastic service and one of the best iced matcha latte’s in Cardiff. Very nice space for getting work done as well”

• M

  Meike

  ·1 year ago

  “I had a vegan Muffin with Pistachio and an Americano. I also tried an vegan Biscoff Latte. It was very delicious. The staff was very friendly. I recommend this coffee shop!”

• P

  PP YS

  ·1 year ago

  “Really nice coffee , nice space for chatting with friends and working staffs are friendly they have specialty coffee retail shelf as well . Highly recommend but no my favourite ham cheese croissant”

• I

  its_ taz

  ·2 years ago

  “I really enjoy the area. it's very cosy and wide open space. The options are somewhat limited, but I do like the beverages, my favourite being matcha coffee, and they do a cold brew. I got a smoothie yesterday, which was great, and the portion was great.”

• R

  Riley Tang

  ·3 years ago

  “I had a pleasant time in the cafe. Wonderful Nitro Cold Brew with delectable blueberry muffin. The overall atmosphere felt cosy and the baristas were welcoming and helpful.”

• H

  Harry Steel

  ·3 years ago

  “Had a trip down to Cardiff bay for a short break and was anxious I wouldn’t be able to get my usual morning coffee fix. After a quick google, we found Quantum Coffee Roasters and decided to give it a go. Service was excellent- friendly, helpful, didn’t feel rushed or pressured. Ordering was painless, easy, and enjoyable. The atmosphere was calm and cosy. I had second thoughts about getting a take out! And, mostly importantly, the coffee was great. Really excellent. Not bitter, not sour, bang in the sweet spot. The oat milk was also steamed to the right temperature. Which quite a few coffee shops seem to get wrong and burn the milk (and my tongue!). We managed to visit twice during our stay, and both times were exactly the same. Even with different baristas on both days. Always friendly and made perfect coffee. It’s a shame that Quantum Coffee Roasters isn’t near my home!! Will definitely be visiting again the next time I’m in Cardiff bay. Couldn’t recommend highly enough.”

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• G

  G C

  ·3 years ago

  “Nice cafe just round the corner from Cardiff Bay. Friendly staff and very relaxing atmosphere. They carry a variety of beans although they are for sale and you can’t choose what your coffee is made of. On my visit the only choice for a drip (filter) coffee is from Yunnan China. Coffee was nicely brewed but a little too weak for my taste. I still enjoyed it though. It’s always nice to have freshly ground and brewed coffee.”

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