Please note that this is written from the point-of-view of the one doing the penetration.

This is a great strapless double-ended dildo. It is smooth, flexible and easy to figure out. I myself am female and gay, so I don't know how well this would work with a male using it as an extra penetrative member, but with a female as the one penetrating, it's perfect.

The bulb is quite large, so have your lube ready; but once inside, it is easy to adjust it to make it more comfortable and since it's flexible, it's easy to get it in just the right position. This is definitely not for someone who is extremely tight/gets no help from lube.

Great thing about this piece--whoever is doing the penetration can feel everything. There is a nice bump that not only holds the dildo better in place, but bumps right up against your clit with every thrust. Because the bulb is large and because of its shape, it also stimulates the g-spot.

Assuming you can keep your end in (be it miraculous muscle power, or with a helpful harness), it is great for penetrating. The shaft is curved, so you can approach from any number of angles, and the shaft pivots nicely to get those hard-to-reach angles. The head in a nice size--enough to have a nice feel, but not so pronounced as to cause pain on entering and exiting.

The major downfall with this dildo is that it is very hard to keep in unless you do have strong PC muscles. If you don't, even a very simple harness will help ensure that it stays in place.

Cleaning is easy since the material is not very porous, and the whole dildo is smooth with no hard nooks to clean. Simple soap and warm water, or your favorite toy cleaner will do.

Definitely consider who will be doing the penetration when buying this. The size and shape of the shaft is variable with the different models, but if you can't get the bulb end inside, then there won't be much going on.