I'd be a bit worried about them peeling off and leaving a mess behind, which means that you'd have to put another one on!!
While I really like the sound of the X11 which is one of the most important things, I do feel that some small niggles could be cleared up.
a) the screen contrast could be higher. Although you can brighten the screen, in bright outdoor weather, perhaps a higher contrast would make things easier? I like the themes, but some are better than others with respect to contrast levels. Grey for instance, is quite low in contrast but Orange is better. No black with white writing? Perhaps that might help the contrast.
b) line out is brilliant. It improves the X1. The only thing is, when you turn it off and switch back on later, will you remember that you left it in Line Out. It is VERY loud if you make that mistake.
c) the lock works fine until you hold the off button down and the device switches off although it's locked! Mine switched off in my pocket. I thought it had a fault until I found that the lock screen doesn't lock the off button. There are some lock screen settings, but none include the 'off' switch.
d) There is no search facility. While you can look via album, artist, genre they are really not that good. Album is fine. Artist is fine, but genre is silly when you have a 128gb card. It comes up with individual songs rather than albums. I think a search is essential on 128 Gb.
e) the order of events on the menu where you scan your card manually or automatic seems to be (for me) in an annoying order. The first option is scan and that could be better if it were at the BOTTOM not the top. It's too easy to scan accidentally so you sit and wait for 3 or 4 minutes while it reads the bigger cards.
f) The card slot accepts cards upside down. The pins must face upwards. If you get it wrong the first time you use it, you can get the card stuck in that slot!!
These are little gripes that if fixed would make the X11 even better for me.
I need to finish by saying that I really like the sound of this DAP and the mild roll off up top seems to help to produce a fullness that is unusual in these devices. It seems to focus really well at lower volumes as well. I prefer the sound of the X11 to the Classic and love not having to use ITunes or Podtrans.
Maybe a few ideas for future revisions?
Where is the manual for this? I suspect that there are hidden commands that we don't know about!!
The quick start up booklet isn't good enough. For instance, what exactly do the lock screen settings do?