As far as retainers, I paid $39 for retainer replacement; don’t remember if it was unlimited, but figured a new one was more than $39, so went ahead with it. Of course, I am 18-24 months away from retainers!
I am guessing due to the tightness of my teeth and many being so crooked/turned, is why I have so many attachments. I am mad at myself for asking when I went for the consultation how many I would have, but I guess it doesn’t matter. This orthodontist did my dentist’s Invisalign, but she had a couple of others she also recommended. I did ask her if I should go to more than one for the consultation, and she said it would all be the same; the price at one might be a couple of hundred dollars different if one was offering a special. Of course, now I wonder if the other would have been the same number of attachments, and the same time frame, but I am where I am for the long haul.
I am getting better get them off either using the hook in a few place or my nails. Luckily I have SNS on my nails, so shouldn’t chip a nail trying to remove them. 
I will do my best to wear them 22 hours a day, but if I were to eat 3 meals a day, that would be tough; I like to linger with my coffee in the morning!
While at my appointment, I did ask about using the Invisalign crystals and/or an ultrasonic cleaner machine. They felt with changing my trays out weekly it wasn’t needed, unless it was something I wanted to do. Once I have my retainers, either would be good as I should be keeping the retainer for a long time. While I had both in my Amazon cart, I took them out for now. I already use an electric tooth brush and thought about a waterpik; may revisit that. I already get my teeth clean every 4 months, which is suggested during treatment. My ortho kit came with extra cases, a nail file, a remover pick and chewies to help set the trays.
@Embracethemess only 14 trays; I have 35 to start; hopefully there won’t be more!
I knew in my area Invisalign is about $6K; and yes, whether you have to wear them for 2 years, or stop after 9 months because you are tired of going on, or feel your teeth are good enough, the price is the price. I don’t plan to stop unless some health issue makes me stop. I did pay all upfront to get the discount, but did think about opening a new credit card with more cash back, but decided my 1% with my Costco card would have to do!
@gosmom I already did a good bit of water due to kidney disease, so I am good there. I have noticed my lips seem to be dryer the last few days; luckily I have aquaphor lip repair already all over the house, my car and purse! Good idea about the gum as I use to be a gum chewer, so usually have sugarless gum in my purse.
One thing I was told is I should still live my life. If I am going to a dinner event like a wedding, leaving my trays out for hours during the event was fine. It isn’t something one should do regularly, but it wouldn’t hurt anything. The ortho said they have kids getting their wisdom teeth out during treatment, and they are told to heal for a week or so and not worry about the Invisalign. That made me feel better, as I really couldn’t imagine keeping them in 22 hours every single day.
Edit to add: My ortho office suggest not using toothpaste to clean the tray, but instead use Dawn dish soap or an antibacterial hand soap. They said some toothpastes scratch the trays, which makes them look cloudy. I have read this a few places online, but it is interesting that Invisalign instructions say to use toothpaste, which is what one would assume they should use. I asked about wouldn’t I need the toothpaste to hopefully remove the plaque, but again, was told with changing out weekly, that would not be a problem. I will see what this first set looks like when I switch to the next set and see if I notice a difference.