That's my combo. I replaced a 11-23 cassette. I am old, heavy, and sort-of a novice (3 months cycling total, 2,000 miles total). Hills are hard. There are times when I am barely making it with the 34/28 gearing, especially very long hills at the end of 50-60 miles rides. If I had a lower gear, I'd use it. But I haven't considered a wider range because I feel like I'm already spinning like crazy to creep along at a snail's pace. Were I fitting a new bike, I would probably use the same combo. Good luck.