Hello, what do you think of this frame? 
Anyone who can comment on this seller, Spcycle?

Unfortunately, I've had a bad experience with SP-Cycle and I'd recommend looking for something else. I bought the SP-M038 and the frame was delivered with a damaged thread for the rear thru-axle. The repair to re-cut the thread didn't last long and the rest of the material crumbled away. We discovered that the dropout laminated into the frame was cracked and had to be replaced and re-laminated. SP-Cycle has been playing dead for a while now, and all their so-called warranty is just a bad joke and a slap in the face to customers. On top of that, cracks started appearing on the frame under the seat post clamp. I tighten everything with a torque wrench and ride without a backpack. At my weight of 87kg, I don't think I'm overloading the bike, but I'm worried the cracks might get bigger over time.

more pics here https://photos.app.goo.gl/LEPh6Dz5tv3gMGZt7

Hi there, any updates on your repair and riding it?  thanks!

Man, buying anything from SP-Cycle was a huge mistake and their so-called warranty is just a slap in the face and a bad joke. I'd hate to see others make the same mistake - it'll save them a ton of headaches, at least. Trying to communicate with them is like talking to a brick wall. They don't want to deal with you at all. The only thing they'll tell you is that you can fix it with a tap, even after I told them we already tried that and the threads didn't last long before completely stripping out. Turns out there was no material left to recut the threads and we later found out that the threaded insert laminated into the frame was cracked, so it had to be removed and replaced with a new one, then the whole rear end had to be re-laminated with the new insert.
The whole repair ended up costing me the equivalent of $175 USD and I haven't received any compensation from SP-Cycle to this day. They're playing dead, even though they sent me a frame with a damaged thread straight from the factory and don't even get me started on the fact that the frame is starting to crack under the seat post clamp. I haven't put that many miles on the bike yet. It's been nothing but trouble so far, but I'm hoping I can finally get some decent rides in next season. On the bright side, the bike is really light and flies like a rocket.

Sorry for not posting an update sooner, I've just had a lot of other stuff on my plate and totally forgot about this forum. But I hope my experience can help others avoid making the same mistake I did.

more pics here
https://photos.app.goo.gl/LEPh6Dz5tv3gMGZt7

Did you weigh the frame before you built it up by chance? Wondering how realistic that 780g number is.

I haven't finished yet, but I'm building on the SP-M038 frame size L (UD matte finish) . Weight without seatpost clamp, rear axle and without hanger is 830g. The quality of the threads workmanship is terrible. Communication with sp-cycle is not great either. I want to gift it to myself for Christmas. I'll be sure to write some report on the complete build then.