Good Sam and Bethesda recently merged and seem to be going through some growing pains. 3 out of 8 of the interns left the program this year - one to pursue another specialty, one to fall back on the area of medicine she'd already completed a residency in, and one... who knows. The tone is a bit passive aggressive, but the training is good. First years get the opportunity to perform a large number of procedures. There is a high risk floor, high risk clinic, diabetic clinic, an underserved clinic, etc. The volume of babies born there is impressive. 20 plus little ones are born daily at Good Sam - the same amount may be born in 2 weeks at UH.
Both programs utilize the DiVinci robots. Both have high risk, but Good Sam has a greater number of cases. 3 of the 4 seniors that graduated from Good Sam this year went on to fellowships - 2 in urogyn and one in MFM. Often people worry that they won't have an opportunity to get a fellowship from a community program. That is not the case here.
I can't speak for the environment at UH b/c I've heard and experienced mixed things. The faculty at GS is good and the facilities are pretty nice. One drawback to GS is that it is a Catholic institution and they have strange policies about birth control and, as you can imagine, there is no mention of abortion.
Bottom line - the GS/Bethesda program offers great opportunities for experience and training. You will leave your residency very well prepared. However, there are a few kinks in the system. UH may be a happier program but you may not get as much experience.
Hope that helps