I'm really looking for a good portable keyboard for my iPad 6th Gen 9.7". I don't need or want a case, just something I can pop in my bag, pull out when I need it, type, and put back when I'm done. I don't think I need anything super expensive because I am not looking to replace my laptop, but I do find at times I would like a solid, portable keyboard. Looking online, I've seen suggestions for Arteck Universal, OMOTON Ultra-Slim and Anker Ultra Slim. Any suggestions on quality, low-cost options?