I actually really, really appreciate the MKPD and bought it immediately when it came out (it was even on sale!). Crafting keys alone takes one whole day to make one key so a space that needes 30 keys to expand would take a month (which is downright insuliting IMHO). Now, I'm able to produce 4 keys per day (three from the dragon and one by crafting) so that a 30 key space now takes 7.5 days which is much more reasonable. I hope they make more MKPD's and put them on sale often.