Yes, I'm very happy with the ST-i. I've got bits on order to put the final guiding solution in place with the OAG, but I was using it with PHD last night to guide while the 6D was piggybacked to the scope. Very impressed with the results so far (3 min subs, no star trails, etc).
Last night the sky was quite clear here, but there was some wind about. At the time I was pointing at Saturn I hadn't "refined" the alignment, so it was drifting and jumping around a bit.
I'll give this another go sometime with lower exposure times. That may make focusing a bit easier too.
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