Share - sex toy by Fun Factory - review by Gingy

I would really love to be using this with my partner, at got off at the same time..

without too much effort on my part?

It really depends on your anatomy and what gets you off.

If it can hit your g-spot, that'll do something, but it varies person-to-person how much. It might hit your clitoris, but again depends on how the toy fits your body - and if you can get off from that kind of stimulation.

Personally, I don't rely on it to get me "all the way" all by itself - because I can't orgasm so far with just g-spot and clitoral touching. Some people certainly can, it just depends. :)

Are strapless dildos hard to use for beginners?

I've never tried one myself, but I've heard they have a bit of a learning curve and you need strong kegels to use them properly. I've also heard, however, that they will work with a harness if you need extra stability.

It really seems like they're hard to use period. I don't know of anyone who regularly uses them without a harness (though I'd love to hear from someone who does).

How do these two products compare? Which one works better in and out of a harness?

Thank you.

They both work well in a harness. Share is a little bouncier and thicker and jucier and Feeldoe is much firmer. I find them both easy to use with no harness, although I find Nexus JR the easiest to retain. Out of all the double dildoes I have tried (all 4 Feeldoes, both Shares, Tango, and the three Nexus sizes, I find Tango the hardest to hold with my muscles followed by Nexus Maximus (weighs a ton) and Share XL (weighs like a brick and is floppy) . I'm a driver. It matters a bit less if you are a pillow princess.

I have the Feeldoe(slim) and the Tango and have used the Share. I agree with Kuuipogal. But for me they all pop out just prior to orgasm despite strong Kegels but the "look" w/o a harness is awesome.
I am a hard and vigorous driver so a harness for me has been the solution. I have the Aslan Jaguar and the Spare Parts both super.

I love when my girlfriend ties me down and dominates me but we haven't given much thought to strap-ons. Are the strapless ones as good as the strap-ons?

A starp-on harness is a good initial investment because it can be used with a variety of toys including strapless ones (if desired).
The strapless ones seem to be pretty good, though depending on who you talk to. The Share line and the feeldoe line seem to get good marks from most and present the best chance that they can be used completely without a harness. The Nexus line would probably be somewhat more difficult for the giver to hold inside without a harness. I think the harness option might be better for versatility, but the Share might represent an excellent choice for you and your girlfriend as well.

Personally, I would say no... just because they're harder to navigate. Certainly possible, and you can add a harness to get more stability while keeping the internal stimulation. There are also some harnesses that will hold a cock inside the wearer as well, so you have more options.
I'd agree with Jimbo that either the Share or Feeldoe is your best bet for doubles like this, the Nexus just doesn't cut it.