I did a series of portraits with Konica 750nm IR film. It gives lovely skin tones but the eyes come out black (well, the iris and pupil does) which can look very striking, but a bit unnatural!

I used flash and it worked really well once I got the exposure right. I've tried portraits with Kodak but found the gritty grain and halation on top of the much more severe IR effect to be altogether a bit much. As mentioned, good for album covers, maybe...

Point is, IR film of all types works well with tungsten light and flash and has the huge advantage that once you get the exposure right you can reproduce it each time and don't need to bracket, or keep your fingers crossed, as when you are outdoors :-)