Hey quiteaud,
To give you a little background, I graduated in May (woot!) and I did my externship at a VA down south. I chose to work at the VA because I knew that it would allow me to get my hands on a lot of hearing aids and see a lot of patients. I knew that I was going to be moving into private practice eventually, and the sheer volume of veterans going through the VA made it a great opportunity for learning to work with a wide array of technologies (going into it I felt like I knew nothing about hearing aids from a practical standpoint). As AUDball said, you're basically giving hearing aids out like candy. I got to work with all of the major brands and see first hand how they perform. Since you're not worried about the patient making a monetary investment (just a time investment), you are a little more free to try different technologies.
Of course, your experience will vary depending on the site and I know nothing of the facilities in the areas in which you are looking. My facility had ENG/VNG capabilities as well as a rotary chair (didn't really get to use it though). We also had posturography available, but didn't get to use it much either.
Of course, there are negatives as others have mentioned, but you'll see negatives anywhere you go. It really comes down to what you want to do with your career (VA, private practice, industrial, ENTs, etc). The VA is a good stable government job. It has nice benefits and steady pay. But it's not for everyone. (it's a government job 🙂)
Being that you're a second year, you have a little bit of time yet to get your feet on the ground and develop your interests through your clinical rotations. It's never too early to look for externships, but I'd say you have a good solid year before you have to really start focusing on it.
I would recommend that as you go through your rotations, consider where you want to be in 2, 3, 5, 10 years -- financially and professionally. That can help direct your next moves.
Good luck!
-DH