Hi Steve.

Zip and Links are the compromise for a one piece mattress which benefits limiting the movement felt by a partner or access issues or Guest House suitability etc.

If there is no requirement to have a ziplink mattress / set, then a one piece mattress is the way to go but bear in mind  that not many properties have the access to take such a huge mattress.

However, it is not the zips you feel (as they are situated about an inch below the seam on the internal side panel) but the tension(s) where the mattress edges are.

The one and only way to avoid feeling any of this, is to use a topper of sorts (such as a feather and down) in a complete Superking size to add a complete additional comfort layer over the two mattresses.

Hope this helps.

John and Ryan.