I have several of those depending on how full, intense you want it:
1. The
Ryder is a universal one and you can't do anything wrong with it
2. The
Gapers Organic is I guess the best inflatable by far. The advantage is that you can increase and decrease the size while you are at it.
3. The
Pfun plug is extremely good for for the P-Spot especially in the missionary position
Hit's it very well.