smoke and mirrors

smoke and mirrors (deceit and confusion; more style than substance) — очковтирательство, сплошной обман

Example 1: I hear that the new software is mostly smoke and mirrors. It looks good, but it does not work well. (openenglishworld.com)
Example 2: ...

Related vocabulary
[done with mirrors]
false impressions
deceit
trickery
bafflegab