Andrejs place is great! Modern, clean, well-equipped and nice and warm after exploring Riga in the spring!
His apartment is about 25min walk from the old town or alternatively there are several trolley-bus stops a few mins walk away (I preferred walking into town just to admire the architecture!) There are two small mini-markets nearby that stock everything you will need for a few days in Riga.
Check in was easy and communication great - I look forward to staying in Andrej's other apartment on my return to Riga!