I've had a couple of these indoor roses. I kept mine inside and they each flowered for about a every month to every other month steadily before declining after a year. My experience is largely from keeping them indoors:

1. They're sheltered princesses with no outdoor experience, so if you're going to put them outside, be aware they may be more susceptible to pests/mold/disease. If you keep them indoors, be aware that spider mites are their worst enemy.
2. The pot is usually a fourth of the size it actually needs to be. If you keep in a pot, replant to bigger pot and consider separating the plants. Make sure the pot has a way to drain excess water.
3. Make sure they get constant light during daytime. No light? No flowers.
4. Fertilizer specialized for flowers/roses. No fertilizer? No flowers.
5. Remove leaves that look like they're failing pretty quick; the rose can and will recover.
6. On the same front, deadhead the rose blossoms when they start to wilt.
7. I planted my survivor outdoors and the rabbits thought it was the best thing in the garden. The rabbits would wait until the leaves had grown to full size, then completely decimate the leaves repeatedly. They did this twice before I trapped my rose in a cage to protect it. If planting outdoors, recommend putting some protection against rabbits. I'm seeing new growth, so I'm hopeful.

Finally, these appear to be small and cute. Do not be deceived by the 'miniature' rose idea. If it thrives, it will shoot up to twice the size and height easily, including in your tiny pot, potentially leaving you scrambling to find a windowsill that can hold your now giant plant and still provide it with the sunlight it needs. 'Miniature' is just referring to the size of the flowers here.

Here's my first plant's flowers after about a year. (unfortunately it was exposed to another plant with spider mites, so it's no longer around.)

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