Are soy nuts good or bad for health ? Would they make a great protein source ? Are they too caloric ? Are they too rich in fat ?

Depending on what plan you're on they can be a great addition. The thing you have to be very careful about is portion control. I like them myself, however, I keep a container with a single ounce serving beside the bigger container. I only take the small container, and refill it only when I'm not hungry (just after dinner is good).

Calorie counts will vary, but dry-roasted are usually about 130 cals / oz. Flavoured ones can contain different oils and obviously the added items to flavour them. They can be as high as 150 cals. I just checked calorieking and dry roasted info (per 1/4 cup or ounce - weigh them though):

128 cals (6.1g fat, 9.3g carbs, 2.3g fiber, 11.2g protein)

Oh, I didn't answer any of your other questions because I don't usually look at specific foods as good/bad too high/too low. I count calories and at the end of the day I look for a balance in what I eat.

I've been wanting to try them! But haven't found them yet (except chocolate covered at Trader Joe's). I think something hot/spicy would help me with portion control.

I used to have a lot of problems with controlling my intake. I can't say I've seen any hot enough to slow me down though. That's why I came to the preportioned containers. I do the same usually with almonds (ie. there's one of each in the pantry).

I'm a lightweight when it comes to heat .

I've had wasabi soy nuts before, they are pretty good.

Soy nuts are yummy and I believe I saw a study that said they may help lower blood pressure, but it was only one study, so too early to tell I think. Regardless, I think they can be a healthful addition to any diet in moderation. Just make sure, like with all nuts, that they are dry roasted and not fried.

Lots of studies have said soy is good for you, but i you have thyroid problems avoid soy as much as possible. Soy can block the uptake of your medication and block thyroid hormone uptake. It was something I didn't know until I had thyroid cancer. I just want to make sure everyone knows the soy had nothing to do with the cancer.