I was in this dilemma last year. I had to choose between a SURF Program and my current research job. Well I ended up staying in my lab, and it paid off with a pub so that was the benefit for me.
I was in the same position as well last year but took the opposite route.
I would highly suggest NOT branching out to another school's lab if your primary motivation is to "get your foot in the door."
Quick background: had two summers + school year research with mentor from my university which does not have much true medical research. I thought branching out to get some more health-relevant research would be a good idea for applying to MSTP programs.
Although the program I attended was pitched as being a great idea for people considering their MD/PhD (it is a top MSTP school), the reality was that the program was really run solely by a few directors of the graduate school who were NOT a part of the MSTP committee. They were really hoping to recruit good graduate students.
We had one day during the summer where we had an optional presentation about the MSTP with the dean of admissions. It was fairly pointless. It was just a bunch of people from the summer program clamoring for attention from this guy.
I made some great connections while I was there with the dean of admin of the graduate school, but she simply had no bearing on or relationship with the MSTP committee (likely not the case with all schools). Also, when you consider that at most research med schools, your PI is one of hundreds, their opinion really isn't going to be worth
that much unless they're one of the superstars there (and the superstars will probably NOT be taking summer undergraduate students).
Additionally, there are some other disadvantages to leaving your current lab that I didn't think about when I did this. Think about it: you're there for maybe 10 weeks at a place where the PI is under significant stress and in all likelihood is not going to be able to meet with you 1 on 1 very often. How good do you think they're going to get to know you? The answer is probably not very well.
The biggest problem that stressed me out the most, is this:someone who you will be somewhat randomly assigned to is going to have a
major impact on your future. You will be paired with someone who's research matches your interests, but for obvious reasons (time), there is typically not an interview process with the PIs. What if your new PI at this school doesn't get along with you? What if your personalities clash (it doesn't matter how personable you are, there are some INTERESTING people out there in science)? If you do a summer program, you MUST impress your new PI in a very short period of time. You really do not have an option. When you apply to MSTPs they will expect a letter of rec from this person (big red flag if it's not there) and I think it will be a bit hit or miss whether or not you get a very strong letter from this person who only saw you on/off for a short time. My point is that if things don't go well, you may be screwing yourself hard.
I was lucky and had a good experience, but MANY people in my program saw their PI maybe 3-4 times over the entire 10 week period. They typically just got stuck doing grunt work for the current post-docs or graduate students. I had to literally fight to get my own project, but it paid off in the end.
If I were doing things over again, I probably wouldn't have taken the risk. If you know you have an excellent letter from your current PI just work your butt off there and pray for a publication.
I don't mean to scare you away. It was good for me to get the experience that I did, but definitely consider what I have said before jumping into something like this.
PS. I got rejected from this MSTP pre-interview.
🙂