Haven't worked in Apogee in nearly 9 years, but used it for sheetfed offset signatures. Current firm I work for uses Prinect and SignaStation for imposition / output for very large format folding carton work. It was tied in with Preps to auto populate impositions. The imposition part wasn't an issue.
When I rendered final plating TIFFs in Apogee, it had issues with trapping or crashing when handling more complex forms. It was going to a TIFF catcher that fed a Heidelberg Suprasetter.
SignaStation - have worked in it for about 1-1/2 years. For our purposes, being an all Heidelberg press room, it's pretty streamlined. Auto ink eaters/takeoffs added. Rendering complex files haven't been a huge issue. Periodic lockups with SignaStation where we have to restart the application, but otherwise I think it's pretty robust. Also feeds a VLF Suprasetter 145
I've come from a RAMPage background at start of my digital prepress career. Would rate Prinect first, RAMPage 2nd, Apogee 3rd.
Hope this helps.