Unfortunately, my wife really does not like vibrators of any sort and the harnesses with internal plugs that are not very connected to the dildo (like a vac-u-lock one we had early on) just didn't work for her either - hence all the effort to make the double-ended ones to work.
We did find that the two-strap style harnesses didn't work well with the feeldoe as the feeldoe has a very floppy connection between the bulb and the saddle and the two-strap just let it escape backwards. With the feeldoe we ended up using a thong type harness with a full waist belt that allowed a lot of upward pressure to be applied. The Share and the XL are a bit more substantial than the feeldoe but we still use them with this sort of harness and they aren't going to escape.