I'm a groundfloor investor. The guys there are great. The product is well designed. A few new loans appear every week or so. You have to be patient. Many loans disappear within an hour or so of being posted, so in addition to being patient, you have to be quick.
The way the new reg A rules work, they have to submit a document to the SEC for every batch of loans, and then wait an unspecified time until the SEC gets around to looking at it and ok'ing it. As soon as one of these pops out, groundfloor posts the loans same day. You can look on the sec.gov web site and see the queue of these documents waiting to be approved. I think they're going to have to get some improvement in this process from the SEC, as it is just too cumbersome at present.
The principals are great. They take time to explain things to me, answer questions, discuss suggestions. However, this is a startup, so there are risks and of course limited loan volume right now.
As they get this process with the SEC to operate more smoothly, I think they will be a fine place to invest. Membership is by invitation, ie you have to send them an email asking to be let in. I suspect they have about 350 investor members, just based on the count of investors in individual loans. Given the limited supply of product, that's plenty for right now. To be sustainable, they need to get the SEC wrinkles worked out, so product flow can scale up. I don't think they'll have any trouble finding investors.