Just depends on the direction he wants to go I guess. If he wants to ultimately be a PM, he should probably do research for a PM instead.
If he's fairly open minded and would just like to do research and be a top analyst, working at a firm that does research exclusively, even if it's considered basic on the outside, might be beneficial for the long haul.
If you go and work for a PM, sure eventually you could become a PM and will gain some depth on the position that way. But if you want to expand your knowledge of investment research, a firm that provides reseach on mutual funds, stocks, hedge funds and more wouldn't be a bad place to learn a few things. The company is growing and is currently being fueled by ideas and I'm sure has a number of exciting departments you could later get into. I've worked for similar firms and just to let you know, most promotions to better departments are internal moves. You basically get a chance to float around and learn about areas of research that you are most interested in. These tech based firms are also very big on getting ideas from employees. I've seen them promote people who have some profitable ideas to head up major divisions. There is still some wiggle room to make an impact in these firms and get your piece of the executive pie.
If you make a big impact with a few great ideas, get access to some excellent new projects and new departments, you could see your career really take off. I would look at the opportunity from a long term perspective. The research may not be up to snuff right now, but do you think they have the capacity to make it be reputable? Could your participation in the growth be profitable and favorable to your career advancement?
If you are planning to just go in, do your job and leave then it might not be for you. These firms usually have Q&A sessions on a monthly to quarterly basis with employees. A lot of employees just complain and don't offer anything productive during them. Others throw out some profitable ideas and get executive recognition. It really is amazing seeing people getting swept up based on their ideas. So I wouldn't completely discount the firm. When I hear technology/finance I think opportunity. So I can't completely dismiss the firm. If their research isn't advanced enough, go to work at the firm and make it more advanced. If you can't implement change, then leave. You'd be surprised though how receptive they could be. You are only a few great ideas away from career advancement at any firm. Lots of opportunity value at Morningstar in my opinion.