It can be itchy and hot depending on the climate. The bonuses are, I was once at a wedding in a hotel and they were blasting the AC. Everyone was so cold they kept chugging down wine but i was nice and toasty lol.
It depends on whether you get fake or real hair. Fake starts to look like barbie hair after a while. Real.... VERY expensive.
I don't think they slip.... but i haven't worn one for long.
It doesn't matter if you have hair or not I don't think.
Maybe you could try different styles... because different styles fit different face shapes. Personally I look good in bangs.
Hope this all helped :)
Oh and fake hair looks fake.... I've had bad experiences with that where people make comments and make me feel like a freak. :(
I hope this all helps :)
Let me know if you have any other questions. :) :)

Wearing a wig can be awkward at first, it takes some getting used to.
I only had one experience with an itchy wig, I don't know why it was so itchy but it actually made me break out on my fore head. It was a human hair wig, but I've had several human hair wigs since then with no problems.
They are easy to take care of. You just wash, condition, and dry!!
Costs depends on where you buy them and the quality. Going through a salon is very expensive. The one that i'm wearing now I actually found at a store through ebay. it's human hair and I think it costed about $130, which is really good for a human hair. And I LOVE it. (i'm wearing it in my profile pic!)
Wigs come in different sizes. You can go to www.paulayoung.com and they show you how to measure ur head so that u know what size you wear. As long as you get the right size you shouldn't have any slipping and it shouldn't ride up in the back.
Human hair is the absolute best way to go. With a synthetic wig if you get a medium or longer length wig ur body heat will cause it to turn fuzzy.
It doesn't matter how much hair you have or don't have.
Hope this was helpful! if you have any other questions feel free to ask. i've worn a wig for 13 years :(

I actually wear a wig now, I have only been wearing it since august. I wear a real hair wig and it cost about $1200 but we got it for around $900. It is never ever itchy. During really hot weather it gets a teeny but uncomfortable especially if you go straight from short/no hair to a wig, it'll be as warm as sort of wearing a hat. I would not suggest a synthetic wig because they start to look like plastic doll hair. You buy sepcial wig shampoo/conditioner/treatment (not expensive) and as long as you follow the directions on the bottle, washing should be very easy! I got mine with a side swept type bang. You can hair some or no hair, even a full head of hair and a wig will fit fine. I personally wear wig tape with mine, its like a 3 inch long peice of double tape that you stick to the front of the wig that keeps it from going anywhere, and surprisingly the wig tape doesnt hurt or anything. I hope this helps!