I had Sprint at school all 4 years myself. I would routinely use it at double strength (1+4 instead of 1+9) and use essentially the same times that I would for straight D76. I always got great negs this way, with a bit more punch and contrast than 1+9. Tri-X or HP5+ at box speed or 800 for 7:15 or so in 1+4 was always good for me...

Sprint makes good stuff, it's all designed to be fairly standard and de rigeur, and there's less creative mobility with those chemicals than with others for certain applications. It is designed to emulate standard D76 and Dektol for film and paper respectively, so it's not much of a surprise, you just don't have the flexibility that you would have for extreme pushing with D76 1:3, or with Dektol straight, 1:2, or 1:3.

That said, I use Rodinal, D76, Acufine and Xtol at home.