Hi to Claven2 (and all MP fans),
I have a Marstar BD-38 also and I love it. It sure turns heads out on the range. The RO fired off a few mags himself and commented that I have nice toys. Reasonable price considering, too.
One comment, I recommend only firing FMJ rounds, as soft points tend to jam going into the chamber. I do love the feel of a blowback firearm - I also have a very clean live firing G43 self-loader (I don't fire it much as it was manufactured with questionable quality control). Firing from an open bolt takes some getting used to. But keeping it on target for burst firing is easy once you learn to correct for climbing (as you noted).
I recommend this model to anyone who wants to feel what firing an MP38 is like, in terms of its balance and weight, etc. I can't get the full feel without being able to go on full-auto (the baby went out with the bathwater long ago in Canada), but it ain't all bad. Being made to only fire on semi-auto this is considered by the CFO to be a legal Restricted firearm.
Harry