My riding buddy has an Aeirs which he loves, he really enjoyed the fact that they sat with him and got the build just right. He’s had 2 issues with the frame where the pivot bolts used were the wrong spec, Bird took the frame in, cleaned it, fixed it (twice), gave him copious amounts of coffee and since then it’s been fine. He was particularly impressed that they sorted it out while he waited and talked him through the issue in detail (he’s an ex-engineer).
I’ve just bought a Zero TR with an ex demo fork and Dan has been super helpful answering my, frankly, dumb questions. I’d buy an Aeirs if I din’t already have a WHyte T-130 Works.