http://www.lovehoney.co.uk/product.cfm?p=16277
This was our first foray into strap-on fun, and it was a great introduction, very educational. The double enders are a great idea, although they do limit you in terms of positions available. Often a hand is required to support the dildo inside of her; particularly with the ToyJoy one, as it is quite heavy. So unless she's a kegel-master, that may be an issue.
But at that price it's worth trying out I think, if only to get started with pegging. It is definitely the most exciting thing that we have added to our sex life, and allows for a completely different experience, physically and mentally.
Once you give it a try and want to move on to your next toy, I would strongly recommend getting a regular strapon and harness set, as it comfortably and securely lets you play with various positions that might not be possible with the double ender. Plus a number of them come with a crotchless harness, so she can still insert toys if she wants that sensation. Love eggs are great for this I think. Missionary with me on my back and a strapon was an incredible experience for the two of us, so I definitely recommend it.
Plus, I'm now allowed to have a wishlist filled with dildos that I want! They're not just toys for females, it's perfectly ok for males to want a nice collection themselves, and this is something that pegging definitely opened up for me. Just be able to laugh about it and have fun with each other and I guarantee you it will feel amazing for the two of you, and bring you closer together.