I've used Parking Spot North and South. Just used North this past weekend and South other times this year. South is better if you live south of the Airport (you don't have to deal with the PA State Police speedtraps on 95 at the Airport exit), but North has the covered parking. I think South used to be Colonial Parking and advertised as Parkign Spot but it looks like their finished their rebrand because I saw both North and South buses this weekend (buses are the same but there are different color labels for "North" and "South". I like them both, but miss Preflight and their covered parking (they closed last year).
As for the PHL economy parking, they did reopen some of it but I don't want to spend time looking for a space there. It also looks really weird and dystopian with grass growing in the cracks of the fenced-off, now unused part of the lot and the used part looking free of grass.