i have one and i love it. i saw papilledema for the first time the other day. it was really great to finally see something other than normal. i use it on everyone to get used to it, even if they come in for a sprained ankle. i carry it with me in the hospital, even tho it is a little big, but i put it in a little case.
how many times have you heard someone say that they just write fundoscopic exam normal and then laugh and say they have never seen the disc or cup or anything. it is a little scary. everyone always wants to try my panoptic and are shoked at how much they see. so many people have said to me, i have never really seen anything before!
as for owning it, it really all depends on what you want to do. if you are going into primary care, it would be a good investment. my dad and brother are family practicioners and they both have them and love it. i guess you could us it in most specialities, not path, rads maybe.....but lots of others.....i got mine thru a med student/resident trade in and it was 300$ including the handle etc. it may still be going on.
ps try using it on your dog.....holy schnikes!