I have the Vika Two Fold and like it very much. The built in tray is handy, as is the big hole for drilling. The height positions are great as a scaffolding, but the table sits a tad low for me for any extended work, besides assembly (I'm 6'1"). If I use a stool it's OK for general work.
I generally set it up as a secondary table when using my miter saw, to hold work pieces, measuring tools, etc, etc. I've also used it as a central work table for routing, jig-assisted joinery, etc. Overall I'm glad I have it. I plan to keep it if/when I get a MFT.
My only complaints about the Two Fold are: it's relatively narrow, so it's not like I can assembly adirondack chairs on there, but conversely this size makes it portable... the leg positions: I'd love if it there were more pre-sets. I could drill more, but haven't. So far I've been able to deal with the height as it is.
I do have to say, I really appreciate it's utility as a scaffold. I've used it a number of times for painting, as a stand to heave stuff up to my garage loft, etc. It's only a tad more trouble than getting out a ladder, but lots more stable and more standing room.
I do not have the Vika work table, but it seems quite similar to the WorkMate, of which I do have one, and those are very popular.