Hey OP, just found this thread and curious how things are going. I took a shot at 25nl on the first of May with a $600 roll, coinciding with my decision to try to clear as much of my $300 added bonus as possible. I put a stop loss at 8 buyins, so if my roll went down to $400 I would have to drop back down to 10nl. I figured with effective 40% rakeback or so it would probably be a good time to attempt such a shot.
Things went decently well, from an EV perspective. In about 15,000
hands with the bonus, I estimated my street for street EV was about 8-10 buyins up.
As for actual results, I had to drop back to 10nl when my
bankroll went down to $400 due to an unbelievable string of suckouts, coolers, and monsters going unpaid. It was by far the worst downswing I've suffered in over 200,000 hands, and the timing for it was just terrible.
I was mostly playing 6-max Rush, I'm not sure what your favored game is. At 6-max Rush, I would echo what was said before -- generally people don't spew stacks as easily as at 10nl and the 3bet aggression is perhaps slightly higher on average. There's also more SPR planning going on, and people tend to be more aware of different betting lines.
Care to share your experiences? I'm currently rebuilding my roll and may take another stab before my bonus period runs out if I can get my roll to at least $500 with another stop loss at $400.