is generic ram OK?

I have an iBook G4 I recently bought used as a second computer. I'd like to replace the 256 with 1gig ram. It looks easy in the you tube video. I see prices quite low online. Are they all good? Alternately, a local guy who does macs (not the Apple store, but authorized to repair) will put one in for $80-- that's the ram and the labor. I'd appreciate any thoughts from experienced users.
Thanks
Machine Model: iBook G4
CPU Type: PowerPC G4 (1.1)
Number Of CPUs: 1
CPU Speed: 1.2 GHz
L2 Cache (per CPU): 512 KB
Memory: 256 MB
Bus Speed: 133 MHz
Boot ROM Version: 4.8.5f0
Serial Number: UV41943TQHV

I'm not sure as to what your question is, but you need the DDR PC2700 Ram stick for the upgrade.
It will probably cost you in the range of 40$-60$.

For a tutorial as to how to do that you'd better visit the iFixit website

Perhaps more clearly:
1) If I do the upgrade myself: is $35 ram as good as $80 ram?
2) If I seek professional service: if a tech will provide and install one gig for $80 (while-u-wait) would experienced users recommend that?

That totally depends on how comfortable you feel about DIY.
If you have the money to spend, let the techie do it.
If you feel adventurous, and I can tell you...iFixit is unprecedented, try it.

As long as you use the right tools, and follow instructions to the letter, it's nothing fancy.

Find some RAM online, read the reviews there. you're going to find a whole lot out there, there's really not a whole lot of difference unless you want to get really nit-picky. Personally, I think it's a rip-off to get RAM professionally installed. If you really want, go talk to the guy at a store, buy the RAM and do it yourself.

And in short G4's are very, very fussy about memory. Make sure you get low density Apple Mac compatible memory. Do not buy from a PC shop as they invariably sell high demnsity memory, which is why it is cheaper. If the shop insists it is Mac compatible, ask if they will refund if it does not work. This is the memory for your machine and OWC are Mac specialists who guarantee their memory.

http://eshop.macsales.com/item/Other World Computing/2700DDRS512A/