I bought this because it was cheaper than buying the two 24-units individually- I don't use the swivel, I just have them sitting side by side on my desk. However, the swivel is really sturdy/quality should you want to use it. I don't know how much I would "travel" with this thing, other than perhaps from one room of the house to another, it seems like the inks could fall out if jostled too much. That said, all my inks fit (I have all manner of hobby-lobby-sold inks: versa, distress, staz-on, etc), and the sold-separate inserts are an absolute must for the distress inks - makes them fit perfectly. My only complaint is that it's boring black plastic, and I prefer natural materials. I'll have to spice it up, I think!
This unit is durable, compact and easy to assemble. The swivel base is smooth and made out of thicker gauged metal as compared to some others I've looked at. The assembly instructions aren't great, but they're adequate. If you buy the inserts (you will want to if you have Distress ink pads or small ones like those) just know that the inserts should be installed prior to putting the PortaInk together - the instructions don't mention that. I also like that should my needs change and I decide I'd rather have wall-mounted storage, I can just take this apart and hang it up.
I recently purchased this item and received it. It was very easy to put together and required minimal know how and tools. The lazy susan on the bottom of the ink pad holder is smooth although a bit noisy. This item holds my Stampin Up ink pads very nicely. The strip of plastic that you lock into place for travel is a little tricky and stiff, however, if done properly you get a snug fit and your inks will not fall out (even if trilling in a circle holding the ink holder).