The concept of the MSCraft swivel seat is great but the reality is a complete nightmare. Trying to slide a swivel and slide seat back into position to get the bolts in, is probably one of the most frustrating things you will ever do. The holes don't line up anymore and to be honest, weren't perfect from the outset. If you think you can use the under-seat storage then think again. It generally has to be emptied each time you want to get the bolts in and out. Why weren't the bolts put on the outside? I tried contacting MSCraft but the email just got bounced back saying the mailbox was full. I'm looking to buy a different style now because I don't believe that the product is safe to use due to not being able to get the bolts in correctly. Disappointing. In my opinion, don't get blindsided by the swivel and slide because it really is a poor design.
The process takes around 15 minutes in reality (about 20 minutes to return it and get the bolt holes lined up:
1. Start with clearing all camping gear from around the seat and making sure it has enough room to swivel.
2. Empty the under seat storage to gain access to the 2 bolts
3. Clear all the stuff you've taken out from in front of the seat again
4. Wrestle with the seat to turn it (make sure no one is in the van, even if it's raining)
5. If there is any kind of gradient then find something to wedge under the seat or it'll slide back or forward
6. wiggle the seat for 5 minutes trying to get at least one bolt in to secure it whilst camping.
7. Wife wants to pop to the town or pub, do the reverse and try not to swear.
As you can imagine, it's barely worth doing. Before purchase, I had visions of pulling up somewhere, spinning the seat and having dinner at the table with my wife and children. This has never happened. We actually purchased two telescopic stools because they were much faster to set up for the table than the 40 minutes swivel and slide seat (15 minutes one way and 20 the other)
We only ever turn it around at a festival and I absolutely dread it. I know getting it back is going to be a major hassle and have this dread that one day the bolts won't go back in at all and I won't be able to safely use the van (I'll have to leave the missus at the festival, actually that might work out well

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I highly recommend you look at something different to the MSCraft Swivel and slide.
I like the look of the VanKraft one. is it the top that just swivels? That makes a whole lot of design sense. Once you've got sand in the MSCraft one you will be wishing you had paid the extra with a design with the swivel higher up.
I think I'm going to fit a folding seat bracket because actually turing the seat for anything less than a 5 night stay, isn't worth the hassle. Particularly in relation to the MSCraft one. When I say a 5 night stay, I mean that the van doesn't move for the whole time. If you are using the van every day then seriously you just wouldn't use it (as we don't)