I have been using bitbond.net for a short time. Here are some thoughts on it:
They are definitely different from btcjam. More bureaucratic, but (hopefully) also more thorough. The company behind it is a GmbH, which is not easy or cheap to incorporate. (Not that this guarantees anything, but still...)
They don't do this whole reputation loan thing that goes on at BTCJam, and I think it's a good thing that they don't. IMHO, the btcjam reputation loans are a stupid idea, and they come down to buying yourself a good credit rating, especially if the borrower pays back early.
Interest rates on the site are always given "per annum". BTCJam gives interest rates over the term of the loan, which massively distorts your view on the real interest rate, especially for short-term loans. I can only assume that some of the borrowers on btcjam have never done the math, or else they would realize they are borrowing money at a p.a.-equivalent rate of 40 to 50%...
Their plan on dealing with non-paying borrowers seems more solid than BTCJam's. As a lender, I would feel more confident investing lots of coins on bitbond.net than on BTCJam. (Especially since they happen to be in the same jurisdiction as I am...)
They do not allow borrowers to set their own interest rates, but rather dictate interest on what they think the borrower's credit rating should be, which kinda goes against the whole free market idea.
I also think the interest rates they set are much too high. We are dealing with a deflationary currency here, after all.
They have very few listings, most of the time they don't have any. I'm assuming this is probably due to a combination of them not being very well known yet and checking every loan applicant a bit more thoroughly, but I don't really know.
A few more checks on the listings would be nice. For example, there's one listing that says "Real estate development. Revenues will come from tenants.". Sounds nice, but it would sound even nicer with a little note besides it among the lines of "Bitbond.net can confirm that this borrower owns real estate that can be rented out to tenants.".
They are much bigger on privacy than BTCJam. You don't get to see a user id or name of the borrower, and you don't get to see a list of investors for a given loan. There's also no way of commenting on a loan or any other way, really, for user's to communicate via the site.
There's a listing up there right now for a 36 months loan of 112 BTC at 11.66% p.a. IMHO, Bitcoin-denominated loans over such long term are a bad idea. Bitcoin still fluctuates wildly in value, and there is no way of knowing where it will stand in 3 years. If there is another big spike in value, it is very likely that the borrower will have to default.
They don't have a support or contact form on their website. Bad move, even if they are reachable via bitcointalk.
They don't (yet?) have a way of selling bonds again. This is bad for lenders who want to get out of a loan because they suddenly need the money or because they have changed their mind on a loan.