Hi InvitesByMelanie!
First of all you have nice stuff in your shop. I think its very cool to have customized announcement, and yours are looking nice and you give wide range of possibilities, lots of colours and fonts.
But ...
I couldnt find the link to your shop on your blog. You have your address written on the banner, but: first of all not many people want to type the address by hand, second of all: its difficult to read it. The font is VERY nice, and I like it a lot. but cant recognize all the letters. I just assumed the webside name. So I think this is something what maybe you could consider for developing.
Regarding layout I agree with OrangiesAttic that the frame distract from the pictures. The dots distracted me a bit as well, but they are pretty cool, so not beeing upset about them, rather amused.
I like the consistency of the colours in the design, looks very fresh and funny as well.The grey banner calmes down crazy colors of dots, and it looks very nice.
Please remember its all very personal opinion :)
All the best to you