I loved Life on Mars, and I think I will enjoy Ashes to Ashes very much as well.
There were several moments where I thought "they can't be serious...
" Gene Hunt's arrival in an Audi Quattro, Keeley Wotsit inexplicably still wandering around in suspenders, The boat in a Miami Vice stylee, and the ridiculous A Team style part, where probably 1000 bullets were fired, with none reaching it's mark
But...as soon as I realised "they weren't being serious" and started taking it as pure comedy - I enjoyed it again.
The 80's were my favourite decade, and I found the symbolism of David Bowies's clown excellent, Zippy and George were wonderful and there were some great 80's flashbacks, the Adam Ant posters, clothes, etc.
As long as it all doesn't get hopelessly silly, and I know there are those who already think that, I think I will enjoy it, but the jury's out - and I am not in a position to vote at the moment !!