As this thread is overwhelmingly populated by Tera Player devotees, I thought I'd offer an ex-owners perspective to counterbalance the fanboy hype.
My early Tera Player (TP) cost 499 Euros in December 2011 direct from Charles Altmann and was an introductory price offered to the first handful of purchasers. The original sales price was 749 Euros or thereabouts. Comparing this initial price with the current TP's cost gives an indication of the hyper price hikes implemented by Charles - ostensibly to match the newly released Astell & Kern AK*** DAP model prices but latterly he just started doubling the TP's cost seemingly on a whim.
Anyway, when purchased to my ears the TP did sound amazingly organic and lush, with a fulsome midrange and cavernous bass reproduction which was a sonically beguiling combination. My opinion remains praiseworthy of the Tera Player today, as it's diminutive size and robustness are still unparallelled among today's DAP's. However, in comparison to the current flagship players sonically the Tera Player (TP) is highly flawed as it truncates both frequency extremes to an alarming extent. Thus the TP's engaging midrange is so noticeable precisely because the WAV music files upper/lower frequencies have been `clipped' and discarded by the Tera Player. Having listened extensively to a number of current DAP's and comparing them directly with my Tera Player, I concluded that more realistic and captivating sonics could be achieved by purchasing a Questyle QP1R, so I sold my TP and have not regretted this decision at all. The QP1R sounds more airy, muscular, precise and realistically engaging than the somewhat muted sonics produced by the Tera Player.
Obviously your sonic opinion will differ, especially if you're a diehard TP fan, but if you are contemplating spending thousands of Euro's on a Tera Player then please directly A/B it with a QP1R or other current flagship DAP before committing your cash, as the TP's quirky sonics are not to everyone's aural tastes!