I don't own a 15" Starfire, but I traveled to Pennsylvania three years ago with a strong intention to buy Tim Burris's Colden Starfire, which was made as a solo. After paddling it for about an hour, I decided not to buy it. My reason was that I didn't find it that much different from my 14' Bell Wildfire, and one of the differences was a negative. That was the increase in beam, which made the canoe more stable than the Wildfire but clumsier for me to do cross strokes at my 5'-9" height. I didn't think it was better than my Wildfire as a day paddling or play canoe for my size, and I wasn't looking for a tripping load canoe.
I was also looking for a canoe that could be paddled tandem, but Tim's canoe was custom made solely as a very lightweight solo without the hull reinforcements at the tandem seat positions.
I have known bigger and/or taller guys than me think the Starfire was an excellent solo canoe for their size and gear load. A member here,
@Pgeorg has had a Starfire, two Wildfires and several other fine canoes. Peter doesn't post much here, but if you DM him that will simultaneously generate an email to him. I'm sure he'd be willing to discuss his experience with you.
@Tsuga8 bought a Millbrook Souhegan from Peter two years ago.
At 33:35 of the following Swift 2025 product launch video, Bill displays and discusses all three Fire boats. He says the Wildfire has become a very popular solo canoe at their Algonquin test paddling facility. Then, confusingly to me, begins hyping the new Cirrus 14.6 that is a solo sized between the Wildfire and Starfire with less stern rocker, which sounds to me like a detuned Wildfire that will be less playful and perhaps a tad easier to track straight for a novice.
