Excellent aquarium plant!
When you're ordering perishable aquatic plants, their ability to survive in an air-tight, dark, often too hot or too cold packaging and without a lot of nutrients for at least 2-3 days is of utmost importance. This plant came to me in nearly top condition on the 4th day, unlike the Pelia (fully dead) that I had also ordered. That alone should give you a good idea of how hardy this plant is.
It is a small, short plant that grows very slowly. I've had mine for about two months now and I'd say it's grown by only about 5-10%. No CO2, no fertilizer, low-medium light. If you have carpeting in mind, you'll need to order this in numbers.
My sample is about half an inch tall, with another 1/2 inch going into the short root system. Ecliptic shape with an avg. diameter of 1 inch. It's dark green in color, suggestive of a lot of chlorophyll and efficient photosynthesis. Leaves are small but very hardy. Most forms of algea cannot accumulate on them and most species of fish won't eat them.