First season was good, Second was wtf, third was okayish. Overall i give it about a 6/7, not enough space battles for the rest of the series.
I vote 8/10. Personally I thought it was really good. The early seasons had really good human-based storylines. Kobol's Last Gleaming and Pegasus/Resurrection Ship were probably the best of these. In the later seasons, the storyline got more Cylon/mystical based, which is great for some fans (like me) but bad for some fans. The latter seasons are a case of Your Mileage May Vary.