I owned a Spirit 23 for about ten years.. my first boat and I loved it and miss it at times, and smile everytime i see a sister boat of hers. I dont know much about the 28 except the lines are similar.
That said, Glastron makes a lower quality powerboat so you can expect the same type quality. I had a major blister problem on my 1980. I am sure the 28 will be fine for a lake or bay but may be in need of upgrading.
ACM - Eastport MD