I actually never tried the tips that came with mine(they are still actually in the paper they came in) I put Spinfits on right away. They are so small and comfortable, I have big ears, you can barely tell I have them in when looking directly at me. I actually listening to them now.Isn't fit/comfort a bit of a concern though , I did not manage to get a good fit with their clone, the Tiso i5, regardless of the tips I used. I'm guessing the foam eartips of the M2 do the job but are apparently not available as replacements ? Well they recommend Comply tips but on the Comply site people are complaining that they are not the same as the stock ones and don't work well...
As a side note, I could swear I read here the other day that the Earin website was for sale ? Or maybe it was that they M2 were no longer on sale
As for their website, they just reintroduced the M2s again, meaning you can buy them again. Anyone looking for a really small TW better grab these before they sell out again.